Contract upgraded without customers consent.

I do believe two of my contract were up for upgards and a consultant had called me to verify. When she called I told her I wanted to cancel the one and I was getting airtime on and the main contract I was undecided if I would proceed therefore I told her to leave my main contract. Her response was she was unable to cancel my contract and I had to go into the store to do such. I proceeded into the store a few months later to be told that the contract had now been upgraded for 2022. I am so disappointed with the snickish way this consult proceeded with the upgrade after I had made myself quite clear I didn't want the contract any longer due to financial strain. The ladies in the store showed me on the system that the contract had been upgraded to 2022 without my consent. I therefore tried calling customer care to assist and I was told to fit the bill of the remaininng months which is over R1500. My frustration is know I am sitting with an account that I did not agree to. I request that it be canceled and removed from my name and that consult that activated the upgrade should be liable to pay for that contract. I have been a customer for years and do not expect such dishonesty from your staff. I was quiet clear I did not want the contract to be upgraded because I had other additional contracts.