INCORRECT/ EXTRA UNKNOWN CHARGES

I am really not happy with Telkom I had previously a Cellphone and data contract with them which ended last year, used to be debit twice or charged late payment fee though I paid my account in time. This year they called me I decided to give them a chance I only took a sim data only this time around same thing happens where I am charged extra for what I do not know. I lodged a complain in March a lady said their systems are down they will get back to me till this day I am now getting a bill that I OWE R460, THOUGH MY MONTHLY PAYMENT IS ONLY R160 0F WHICH I PAY EXTRA MONTHLY WITHOUT FAIL.

CAN YOU PLEASE CANCEL MY COTRACT BECAUSE YOU ALSO RUINING MY CREDIT PROFILE, I AM ALSO TAKING THIS FURTHER WITH THE OMBUDSMAN.