Erroneous billing/forced payment job loss

I have requested a bill breakdown since April 30 and have not received. My service was partially suspended and refused to be restored because I applied my phone payment to the wrong account. I'm being charged for services I did not receive for 3 months as I was with another mobile provider because of these same reasons. I've been lied to,hung up on,given misleading information as well as completely inaccurate information. I had words with a supervisor and asked for her supervisor and refused. She placed a note on my account saying balance of $186 has to be paid but I never had service for those 3 months. They do and say whatever they want because there is no accountability and they are over seas.