Handed to Legal Dept wrongfully!

To my surprise I was informed on 16 Aug by MTN Mimosa BFN branch that my account is blocked and handed over to the Legal Department as well as to the Credit Bureau showing I'm a slow payer while I was enquiring when I'm due for upgrading. Meanwhile, my account is 100% up to date with payments for monthly subscription fees. During June 2015 proof of all payments were sent several times by MTN BFN HQ to Accounts in JHB HQ but obviously no corrections were made to my account! My biggest concern is, MTN is causing to jeopardise my credit record while they are the one's not coming to the party! I'm so desperate to resolve this matter, I even went so far to sent all proof of payments to date to the Legal Department via email on 17 Aug but still no response! With this pathetic service I will rather cancel all contracts after I'm a client of MTN for the past 13 years. They did not even made 1 phone call informing me of the status on my account. They just hand over..... it is much easier! So much for customer service. I will rate them 0 out of 10!