Billing issues

I was handed over for my account being in arrears, I've since been paying the account monthly without default to the attorney responsible. A total of 4500 was paid, I requested my account not be terminated as I want to continue my contract. I was informed by MTN that they cannot assist me I should speak to the attorneys, I made the necessary arrangements and was informed all is in order, I called yesterday and my account is now handed over to another attorney for what reason I don't know and I'm told I now owe an additional 2000 some odd rands, the mtn agent refused to assist me. I requested a debit order on my account in March which was not done, I used to pay my account at the mtn store in carnival mall and stand for min 1hr at a time just to pay my account, now my account is sitting at different attorneys, no one to assist and my contact terminated because of others in incompetence. I want my account reactivated and sorted out