Constant incorrect bills

I need help with someone who actual is able to understand everything that is wrong with my bills and return at least 100 dollars over incorrect charges or false promises. I feel that I have been scammed and led astray by phone and chat help. There are now 3 bills incorrect, I have recorded 10 hours of communication and for this most current bill 4 calls within a week where I was constantly reassured before and after the incident that things would be resolved.

They have not. Xfinity continues to find way to charge me incorrectly or not honor their changes until much later when I have to get credit. Now I keep getting transferred to people "who can help me" who then either don't help, promise me help that never happens, or end chat/phone before we actually say anything. The longer this goes the more complex it goes. 

This is getting to the point that small claims court will be worth it and the amount of money is worth paying FIOS to install lines to my house to replace xfinity. I just want to resolve this definitely and I can't

----

I had a new contract made in July. Was overcharged subsequent bill. In August the customer service representative said I had to redo my contract. Promised me some incorrect things would be resolved. Nothing has been resolved except for a few credits after the event. There are still multiple incorrect things for upcoming bills and I do not have the time to keep calling and retroactively getting credit. Also the amount of extra charges is growing and it's becoming too much for base representatives to return me. I have EVER contract I signed and every conversation but they don't give me a way to share any of it so its just a bunch of explaining and is getting ridiculous.