No one can or is willing to help!!!!

MTN has handed my account over to their legal department for a reconnection fee which was not paid - I was never made aware of this and until today no one can tell me what this reconnection fee was for. I have contacted VVM, which is their legal dept, and according to them my account is paid up and I am not in arrears and therefore my account has been handed back to MTN. <br> I am trying to buy a house and this has come up on my credit report, I am trying to sort this out as soon as possible, I need a letter stating that my account is paid up but no one is able to help me, the branches I visit say that my account is not even on their system, yet I am paying them every month!<br> this is an urgent matter and speaking to the call centres also doesn't help as they put the phone down in my ear every occasion I phone.<br> please, all I am asking for is a letter whereby it states that my account is not in arrears and also for this error to come off my credit report as it should not have been listed there in the first place