Xfinity is Horrible

Xfinity Service has gotten horrible! I am so exhausted with the amount of phone calls I've had to make with absolutely no results. I have been with Xfinity for over 38 years. I absolutely loved and was extremely happy the first 37 years. A few months ago the shows I was watching started tiling and freezing all the time. They came out and checked everything. They said it seemed to be fine. The problem kept happening, so I called them again and they decided they needed to run a new cable from the street to my house. They did that and I still was having some problems, so they decided to change my box. They gave me the new streamline box and took the old one (with the clock). This is where the problems escalated. I have tried, I think six boxes... All horrible. My remote unsinks everyday. I have to go through the whole setup everytime. Still not working right. I came home last night to find ALL MY RECORDINGS... OVER 100 hours were all DELETED!!!!!!!!!!!!!!!!!! 
Another very upsetting thing that I noticed recently, and really should have checked sooner, but my bill is online is, was a $15 charge for unreturned equipment monthly. I called to find out what it was for. They told me that when I got the new tower for my internet, which they came to my house to set up, that I didn't return the old one. There was no old one, I used to have ATT internet before bundling. I returned that to ATT. SO... I have been charged $15 a month for the past 2 years because of an error they made. They are currently reviewing and will let me know if I will get all that refunded back. REALLY?? Because of their error? I have never been so upset and frustrated with a company in my life!!