Nothing but Internet Issues

Less than 1 year ago we went through constant internet lost connections. Three or 4 techs came out - they did this, they did that and all of sudden everything was fine. Up until two months ago and now, we're back to fighting to keep internet connection. The tech came out and told us it was OUR problem, due to the plug not being grounded. NOT TRUE. It is grounded. Plugged it into a different outlet and guess what? Same problem. Oh, and by the way, we got charged $110 service fee and $25 installation fee when the tech did ABSOLUTELY NOTHING. Internet was good for a whole 2 weeks and then started acting up AGAIN. I called Xfinity and was told if I change plans it WILL ALL BE BETTER. Baahaa what a joke. I was sure that wouldn't do anything because no new equipment was being sent out - but whatever, the customer service reps are as bad as the techs are. So guess what - I "upgraded" [Edited: Language] still poor internet. [Edited: Ranting] I want to get rid of the [Edited: Language] Gateway and get my own, but want to know what the cost will be. I have been a LOYAL Xfinity customer for 20 plus years and what has it gotten me?!!?!? Not an [Edited: Language] except broken promises and headaches.