Installment Plan

I am on the installment plan to stop my internet services from being shut off and what happens, my services are shut off anyway. I paid the $50 and it shows that I paid it. I was even told this morning after the rep checked that my internet would be restored but it hasn't been. I feel lied to and taken advantage of. Either give me my money back or restore my services. I called 3 times and was put on hold for over 30 mins each time. That is not good customer service. I am extremely angry. I have been a loyal customer for 3 yrs. I have an issue 1 time and my bill somehow balloons up to over $800. I still don't know how when all I had was internet service. I had no access to cable. So here's what I'm thinking: refund me my $50 so I can return you yur equipment and I can go to AT&T internet. Then I can get my cable through YouTube TV. I will save a ton of money that way. I just feel really used and lied to right now and I don't trust Xfinity anymore. Unless you get rid of my bill, I don't see any other resolution to this. I paid that $50 thinking it would keep my internet services active and you shut it off anyway. You broke the contract. So I owe you no kind of loyalty at this point.