No feedback, no service, no interest from MTN

If you are considering upgrading your MTN contract, please take note...Extremely disappointed with the lack of service, lack of feedback and general don't care attitude from MTN. I attempted to upgrade a contract in January as I urgently needed a new device. No feedback was provided on status of upgrade. After multiple follow ups from my side, I was eventually advised that there was no stock of the device... More than a month after initially initiating the upgrade. Out of pure frustration with the poor service and difficulty I experienced with trying to contact MTN, on 22 Feb, I decided to cancel the contract instead of upgrading. The contract ended on 16 Feb, so I am now being charged non-discounted rates for the additional month that MTN decided not to keep me informed on the upgrade. Had I known this was the type of service I would be getting or even if I was just advised at the time of upgrade that there was no stock, I would have cancelled my contract on 20 Jan instead of upgrading. I have emailed the customer care line and received a generic response relating to out of contract rates. There was no acknowledgement of the fact that MTN was the cause of the delay resulting in me having to continue with the contract for an extra month. I sent a further email on 23 March and have still not even received acknowledgement of that. I would be happy to pay the normal contract rate for the additional month, even though it was an MTN delay, but expecting me to pay the non-discounted rate is ridiculous! Why I should be penalised for MTN inefficiencies?