GETTING OVER CHARGED AND NO HELP!!!!

I recently checked my account and found out I've been paying for "lease" option on a phone I own so I called customer service and explained and they agreed it's a mistake and put me on hold, after 15 minutes she came back and said because I haven't been looking at my bills theyre only going to refund 2 months back and wont be able to do anything else. I found it ridicules and asked for a manager, I waited 1 hour and 32 minutes until they hung up the phone. The rep basically told me they wont do anything and their manager wont do anything else too. This is absolutely ridicules and the fact that no manager was available to talk to me made me more upset. They made me wait 1 hour and 30 minutes to just hang up on me. T Mobile you suck and I will continue talk about how terrible you guys treated me. Switching to AT&T ASAP.