No Refund

So I purchased additional Data on my existing Data contract which cost me R449. a double payment was made with debit order and credit card. After about 4 months with numerous long sessions on the call center they have logged 8 calls. 4 of the calls was an escalation calls to a manager to sort this out and still not even a phone call back?? The other calls just get solved without any detail??

If I should refuse to pay Telkom they will black list me immediately but it is okay for them not to pay me how is that fair or good customer service.

CAN A MANAGER PLEASE PICK UP A PHONE AND PHONE ME AS I HAVE LOGGED CALLS FOR YOU TO DO THAT????? And stop solving calls without confirming with your customer that the job is done ??