An additional contract not agreed upon

i opened the account in April subscribing for the special which was advertised for the amount of R199.00, I later learned through their call center that there are two numbers registered in my name, getting them to cancel the other no is a mission, I have already been billed for that particular no which I haven't received any cell from them and I have been to the shop several times and nothing has been resolve, I have to reference no for this particular incidents but still has not received any response the ref no are *** and ***(this was opened on 24/06/19, as I am writing this the debit has been taken from my account for the contract I didn't enter into. Hello Peter Kindly assist me in resolving this problem