I want my refund

I have cancelled my Telkom wifi line in September. I did give a months notice. At the end of October I got debited went to branch,line was no longer active and was cancelled early October. I have not had wifi since. Telkom sent me a message saying my problem was resolved and credits will be passed but you go and debit my account again now for wifi that I dont longer have. Absolutely ridiculous!!! So now I am owned 2 months of instalments. Pure *****. Please get someone to call me asap. I am tired of holding on forever on the customer care line...