Appalling service received from MTN GreenstoneMall

My ref: ***. I logged a call with Thabiso at the Greenstone mall branch on the 7th of June regarding the incorrect billing on my account resulting in the account being suspended. He promised to call me to provide feedback. I have sent him numerous e-mails to [Email Removed] I also spoke to the branch manager Viviene who also promised to provide feedback. I have not received any correspondence from them since 8th of June and i had to call in to get feedback which they were clueless about. Thabiso had a look on his system on 7th June and told me there was an error on my billing and he would sort it out therefore he logged a call... I also logged a called with customer care MTN ***. Still no response. I need a resolution on my account before the debit order goes off as the billing is incorrect. Thank you