Wrong Charges

I was sold a contract without being informed the sim would not work unless you are next to a telekom tower. I was charged R650 initially. When i complained that the sim did not work trlekom cancelled the contract and promised a refund. Instead of a refund i was again charged for the cacelled contract. I tried to phone had an unhelpful person who kept telling me the system was slow and put me on hold. I also emailed but have not received a response. Laura at the Telekom office in Pietermaritzburg Midlands Mall has tried her best to help but the accounts department keep charging me. I will never take out another contract with Telekom.