Internet Dropping Multiple Times Per Day (Wired & Wifi)

I recently moved into a new house in November. After years of having reliable internet connection with Xfinity in an apartment, I was pleased to discover that Xfinity was also offered in my new area. I transferred my service to my new house and working from home, I needed to have internet service as quickly as possible. Since my home was a new build, there were no existing internet lines going into the home so Xfinity had to come out and run new lines in my home. To give you a visualization of where my home is located, there are two power lines equidistant from each other on the street side in front of my property. When Xfinity set up the original line, they used an above ground cable from the right power pole and ran the line around the back of my house to the other side where the electric box is located. Using the equipment that I brought with me from my apartment, I was up and running with internet within a couple of hours and everything worked perfectly for about a month. The Xfinity tech explained to me that I would be notified of a team coming to dig my line underground within the next month or so. 

About a month of living in my new home with no connection issues, unsurprisingly I get notice from Xfinity that they plan to dig my line in the next couple of weeks. One random day, without notice, my internet connection goes out. After going through a few of the rebooting steps to the modem, with no luck, I look outside and see that the line is no longer going around my house. I step outside and see that the line from the right pole is cut at the base but that a new line from left pole is going into the house. I still do not have internet at this point so I call Xfinity and they are not able to send a tech until the next evening (annoying since there was no notice of when they were actually digging the line but understandable). 

The tech arrives the next day after I miss work for a day and a half and explains that it is actually subcontractors who dig the line underground and not Xfinity. He told me that the subcontractors did not secure the line back at the power pole and that is why my internet was not working. Internet came back on quickly from there and the tech left. 

The next day, I started having frequent internet drops. Some drops were 3-5 minutes and some would take 25 minutes to come back on. This was happening 3-4 times per day for two days and then one day, I could not get internet back. Called and got the tech back out (ironically, the same one who was there a couple days before), he ran a test and saw that something was going on in the underground line. He explained that since it had been snowing and melting that water may have gotten into the underground line when it was being dug and split the cable when it froze. He then ran an above ground wire again from the left power pole and disconnected the underground wire. That evening, I experienced one quick drop in internet service but it came back on quickly and the light on the modem never changed from white. 

Over the course of the next few days, I started getting internet drops again and called Xfinity. Xfinity ran a couple of tests and said that they thought it could be my modem. They told me to go to Xfinity and drop the old one off and to get a new one. I drop it off that afternoon (missing work again), and get their newest modem that then ensure will fix the problem. I plug the new modem up that evening and get it set up. The internet speed seems faster but within a couple of hours, the same problem occurs. Everything connected to the internet will stop working (tv, phone, etc..) and the signal will go out. More often than not, the light will not change from white but maybe once or twice a day, I will occasionally get a green light on the modem but it seems to come back to white within a few minutes. The internet will also go out while using a wired connection to my work computer sitting less than two feet from the modem. The modem will generally not change from a white light but I am sitting there dropping work calls due to no internet connection. I have run numerous internet checks through the Xfinity app, if the internet is working it will show me getting very good internet speed but if I am in one of the drop times, it shows that there is a problem connecting. 

I recently went out to my internet box sitting on the side of the house and opened it up. The underground wire was not plugged in as expected and the above ground line was plugged in. When I opened the box, there was an additional splitter sitting there not being used so I thought that was strange but maybe irrelevant to my issue. I ensured that all of my connections were at least finger tight and snug. My neighbor who also works from home has Xfinity running from the same power pole. Every time something happens with my internet I text to see if he is having the same issue. Ironically, and almost a running joke now but there has not been one time that he has had any connection issue. 

It is strange that when I originally got everything set up at the new house, I had no issues. I miss the line running around the back of my house that never gave me any problems. I know my boss is growing tired of my frequent and unexplainable drops throughout the day when I am scheduling surgeries for patients. With all of my equipment and lines being brand new, any suggestions as to what I need to do?