MTN Unable System too complicated

Every time I upgrade my contract with MTN it is an absolute shambles. My previous 2 year contract upgrade resulted in me spending a week on the phone every day to get it resolved. Everyday there was a different story from their call centre. <br> This last upgrade now even though I renewed the same contract as per before now was the same. All services stopped working after the upgrade was processed, data, SMS and voice. Also international roaming got disabled again. I eventually fixed this over 2 days and thought that was it. A week later my phone cutoff mid call stating that I have run out of airtime. I have never been on prepaid or limited contracts. I have now been trying for over a week to get them to change my it so that I do not have a limit or at least set it higher. Everytime I speak to someone there is a different version of what the problem is. <br> Im about to cancel the contract an port to Vodacom. Some please tell me they are better!