Impossible to end a contract with Telkom!!

I signed up for a LTE contract with Telkom. I have seen out the 24 months of the contract and DO NOT wish to continue with the contract. So on the 31st of October I sent in the cancellation form as given to me by an individual at the Woodlands Boulevard store. No confirmation/Reply. During the week a sales lady phones and asks if I would like to upgrade my package now that I am eligible. I mention I have asked to cancel but there is nothing on the system when she had a look at my account. I sent the forms in again on the 14th of November. Walk into the Woodlands Boulevard Telkom Store on the 29th of November. System has no record of my cancellation requests. So send it in again to the agent helping me. She hands me a reference number and says someone will be in contact with me. I wake today, 1st November and my account has been debited!!!! I HELD UP MY END OF THE CONTRACT TELKOM! NO HOLD UP YOURS AND LET ME END THE ON CONTRACT!