Worst client service from MTN Olympus

I signed up for a new data contract at MTN Olympus on Sunday 11 July. When I got home and read through the contract I realized that what was in the contract was not what was explained to me by the sales person at MTN Olympus. I went back to the store on Wednesday 14 July to cancel the contract. I was informed that they cannot cancel the contract. I insisted to have the contract cancelled because it was still within 7 days cool-off period. I had to phone MTN Accounts department from the store and the MTN representative had to explain to the MTN Olympus Store Manager that I have the right to cancel the contract and that I cannot be charged any penalty fees. After a long argument, Nokuthula Ngcingwana confirmed that they cancelled the contract and that it will take three days for the cancellation. I asked for proof of the cancellation and I was told that they are unable to give me confirmation of the cancellation. After I had to phone the MTN accounts department again to explain to the store Manager what to do, I was provided with email confirmation that my contract was cancelled. I sent numerous emails to the store to follow up on the cancellation without any response from them. When I contacted MTN accounts department two weeks later, I was informed that they have not received the cancellation from the store yet and that I will be billed for the full service.