Pathetic service!!

I was informed that my contract has ended, in April 2018 i called in to cancel it the consultant assured me that the cancellation was put through to be processed , it was NOT done. I called again in May to cancel it another person assured me it will be cancelled. It is now june and my contract bill is much higher than normal!!!! Phoned Cell C customer service and i was told that the contract has not been cancelled!!!!! This is really frustrating because i am paying for something i dont want!! How many times must we call in to cancel a damn contract ? This is very very pathetic service!!