Poor service from MTN

I've been trying to contact MTN with regards to settling my outstanding amount after noticing that no debit order was going through my bank account. The call center agents told me that my account has been handed over to their legal department and they can give me their contact details and even tough they the see outstanding balance they cant tell me how much i'm behind by (apparently they are not allowed to disclose that even i'm the account holder). All i get is that they will contact you withing 48 hours and now is a week with no response.

The next thing is i will be blacklisted even though i'm trying to make things right because even a single day i never got a call or email from mtn to tell me that my account is behind or the debit order is not going through.