Worst cellphone service available!

I had/have a contract with MTN to provide my wife with a telephone service. Due to all round poor network service, (no network, dropped calls) we went into a MTN store to cancel the contract on expiry. This could not be done in store, had to be done telephonicaly, via their call centre! This meant we had to listen to some ****py music for up to 45 minutes a time, actually getting a body to speak to us only on the fourth attempt. We were offered a fancy deal if we renew instead of cancelling! I insisted on cancelling. We were told to phone again, on date of expiry. The contract expires on 16th August, so we tried to phone them again today to make sure the contract is cancelled and not extended. My wife, who has a lot more patience then me, listened to the ****py music for 48 minutes, no response. The second time she tried for 33 minutes, and on her third attempt some lady came on the line after listening to that ping-ping music for 28 minutes! When I mentioned this endless waiting we were told that they do have high call volumes! The fact that you are paying for a so-called service, that hanging onto a phone for hours cost you money never mind frustration and stress, is none of their concern, you are only a paying customer after all. Again we were offered a deal, something about 3 months for free if we do not cancel but renew! I want that contract cancelled. I had to threaten legal action against MTN to get what I wanted, namely have the contract cancelled and my wife's phone number put on pay-as-go, so we can port it to a new service provider. Let us see what happens tomorrow, we were promised sms's confirming that all this had been done! (I have asked a lawyer to be on standby.)