Telkom Mobile is very useless these days

Telkom Mobile is pretty useless. Ever since I lodged a complaint twice for my account ***, for their failure to debit my account at the right time and when there was enough money for the debit, they`ve never responded to me. Not even to acknowledge my complaint or just to send an sms for acknowledgement. They keep on sending the uncorrected bill which I have complained about but they are not attending to my complain. I have tried calling and tried calling the Menlyn store, they never pickup.