Angry customer

Hi, am writing to complain about the terrible experience I had with Telkom, I called telkom to enquire about the unlimited data Sim for R300 and ended getting billed more than what I asked for, they deliberately delivered another simcard for 449 which I never asked fir, the simcard was never used but when you call in, nobody want to assist. I got transferred from one department to other department. Why must I suffer or pay for something that I didn't order. Or maybe is thier strategy to rob ppls money. Not happy at all. At this point I need cancellation as is my 1st month but am already having issues