Telkom refuses to refund credit balance

I have a credit balance with Telkom. I requested a refund of this balance. Telkom is refusing to pay this money back and demanding proof of all the original payments. I do not have the proof of all the payments and I do not want to entertain this as it has nothing to do with them having to return my money which is in my account paid in by me. By refusing to give back my money they are now keeping it *******ly. The National Consumer Commission (NCC) seems to be in agreement and I have consequently submitted the necessary paperwork and made a case against Telkom to this effect. This will be resolved by Telkom or the NCC.