Extremely Annoying Experience with Xfinity Wi-Fi

I've had Xfinity Wi-Fi (fiber) for two months now, and the experience was not good at all. There were three issues:

1. Constant interruptions with our Wi-Fi (both regional and router issues) in the last two months. We had to restart the router several times to get the Wi-Fi back to working.
2. Received a message from Xfinity on June 4th (a month and a half after installation) saying that our underground cable line is complete, only to return to my house a few days later to see the fiber cable is still on top of the lawn. 
3. Had router issues again this Monday evening (June 17th), contacted Xfinity service and they could only schedule me for Sunday. On Sunday (today), the technician arrived late from the scheduled time (scheduled 8-10am, arrived 10:30) and told me he was not able to fix the internet because he works on co-axial only not optic fiber. Called Xfinity service AGAIN and it took half an hour for them to realize they sent the wrong technician. They ended up canceling the service and rescheduling another one for next Monday. During the entire week I had to work from home using my personal hotspot, and Xfinity had only offered for a discount for the internet this week.