Cancel the contract of *** now I don't want it any it has ended 24 months. I never signed for 66 months nor 100

MTN my contract Ended on the 16 June I have tried to phone customer service many times I had to wait on Line for 25 and thirty seconds after Mpho answered and hung up on me I want the contract to be canceled and I went to one of the outlets where they said one needs to cancel by phoning your sabotaging people.