Very poor service

Had such poor service when dealing with Vodacom online upgrades. Phoned in to cancel a contract and they convinced me to upgrade by offering a better deal than the opposition. 1 day after doing the deal I realized the wrong colour had been selected. I phoned immediately and cancelled before the phone was despatched. The lady I spoke to confirmed that they had sent the instruction to stop the delivery. One week later I get a message to say that the phone is getting delivered. Assuming the delivery is now the correct colour phone it arrives and I discover the colour is wrong. Once again I phone to complain and another week has passed and no one has collected the unit. In this time Vodacom will not upgrade the contract until they have this phone back. My question is why should I now be inconvenienced because Vodacom cannot get their communication right even though our calls are recorded and I have complained numerous times? Vodacom offer no solutions or try and keep a loyal customer happy and I wish I had changed my whole account which includes 5 other contracts before I did the upgrades.