MTN making it impossible to cancel a contract. No response, waited 50 minutes on hold.

Not sure what the point of having a customer care line is for? I received numerous calls about upgrading my expired contract, however upon my request to opt to cancel the the contract I was redirected to a host of people. I waited for a period of 20 minutes on hold and there was no answer. So I hung up the phone and called again. I followed all the prompts and was redirected several times. i was finally directed to the same number and waited a further 30 minutes on hold. there was no answer. I eventually elected to hang up again. This is honestly unacceptable. It is unfair that it is made so difficult to cancel a contract, however entering into one is so easy. All I want is to be released of the contract. How many times am I going to call in before I will be able to cancel?