Internet disconnecting multiple times per day, especially at night.

The internet keeps dropping for absolutely no reason and no outages reported. It's usually only out for a few minutes but it is incredibly aggravating when myself or one of my kids is online trying to do something important trying to complete something and then right in the middle of it we get disconnected. It is mainly happening at night between midnight and 2:00 a.m. when pretty much everybody is asleep except me. I'll just be watching TV and then all the sudden streaming no longer is coming through because the internet is disconnected. Most of the time it happens multiple times in a row two or three times in a row and there's no understandable reason why. I have checked all cords all equipment, done the troubleshooting and everything is exactly as it should be and always has been. This has been occurring for the past three to four weeks. Prior to that time there hi+were absolutely no problems with this at all. We have not added any additional devices or anything like that in the past 3 to 4 weeks (the time period in which this is occurring). Since this problem has been occurring, there is nothing any different in the household at all thus, no understandable reason is apparent for why this is occurring. What is so frustrating, on top of this, is that someone at Xfinity decided to remove my ACP credits that I've had for a year and a half for no reason and I just had to pay 60 bucks for this (Edited: Profanity) service. How about that? I was getting my credit and everything was free up until about a month ago when I had to dish out $66 for service and now it's the worst service I've ever had. I don't know what's going on but something needs to be done and I am documenting all disconnection times and will be demanding a partial credit/refund. This just cannot happen in today's world. Ppl can't be right in the middle of something important like my kids summer school (my daughter was right in the middle of a TEST ON TWO OCCASIONS) when this occurred. This is unacceptable. 

(Edited: Profanity)