CANCEL TTHE CONTRACt.....

I am very frustrated with MTN. Got a 2 data contracts over the phone and received my Sim card on the 6th March... To this day, both Sim cards do not work. I have called customer service a million times and I am always told to wait for 24 hours... We are letting into a new month and still nothing. I called to cancel and they sent me from one department to the other... spend the whole day in the phone... worse is they want me to pay a cancelation fee for something I have never used. When I reached the relevant person to cancel, the phone was dropped and I had to start that whole process for almost 3 times.... They said I must go to the Branch, now the branch is saying they must pick the tings up themselves and cancel... They cannot cancel... I REFUSE TO PAY FOR SOMETHING I DO NOT USE