Still Waiting Since 8 June

In early June I received a call from MTN to ask if I would be interested in an upgrade I was due for. The gent on the phone was very helpful and the offer sounded good so I accepted. I then received SMS notifications from MTN confirming that my upgrade was approved. I subsequently received a SMS saying that the new phone would be delivered. This never happened. I called the number on the SMS and was told the phone had been returned to MTN and it would be redelivered. Never happened. So two and a half months later after many calls, I have still not received the new phone and accessory pack I was promised and to make matters worse MTN are charging me the new amount!!! Then the icing on the cake, I called the MTN "help"desk. The agent told me it was a MTN appointed subcontractor selling the deals so it was not MTN's problem and I must call the sub contractor. Excuse me, when are MTN's subcontractors the clients problem?