Complaint Review: T-mobile

I have been with T-mobile since 2004, and at first they were okay company and so I stayed with them. Recently the bill was becoming outrageously high so I decided to change my plan from contract to the "month to month" plan even then my payment was still high. They kept charging me every month for this or the other and because I travel for work the 5 GB per month data allowance was not doing it for me. So I decided to go with Cricket who had a plane of 10GB per a month for 60 dollars which was about at least 20 dollars or more cheaper than what I was paying at T-mobile. So in July of 2015, I decided to switch company and I called T-mobile customer service and I asked them that I am changing over and if I make the switch at the end of my billing cycle which was the 14th of every month, will I be charge for anything. The customer representative said my account was 0 and that if I change over I will not incur any outstanding charges. I asked the representative just to be on the safe side because I do not want any surprise bill please document our conversation on the system. She said she would and I went ahead and switched. Two month later I find out that I AM BEING BILLED FOR 230.89 FOR I don't know what. When I call their internal collection company CONVERGENT they tell me that the "month to month" plan is not really what it means, they charge on the back end. They have no idea why I am being charged and my conversation with earlier customer service conveniently was not in the system. So I need explanation, and I want my money back because I paid it because I did not want my credit to be affected that I have been working hard to keep clean. Do not do business with this company they suck ... they have no concept of customer loyalty I have been with them for ten years and this is how they repay my loyalty. Also the month to month plan does not work how they advertise it, it is a rip-off and it feels like I am being penalized for leaving the company even though I was not under contract.