Upgrade still no device

<p>I recently upgraded my contract on the 27th of November 2016 to a 40inch Samsung TV at the MTN Greenstone store . And still to this day I have not received my set. I tried to get ahold of the store and no one is giving me answers. I tried calling the national line and I am provided a number for a supervisor who isn't on duty and who can't provide me with assistance. I have already paid my installment for the contract but still the device hasn't been delivered. May I please cancel this contract since there is no service delivery here</p>