Vodacom and Hisense

First of all Vodacom shouldn't let the brand promoters in the stores. I was manipulated into buying a Hisense H50 in East rand mall vodacom shop. First time I charged the phone it started overheating and worse all the features being advertised are just pathetic. All pictures on the phones appeared orange. I took the phone back just less than 24 hours. They refused to give me a new phone. Now they are saying that there is nothing wrong with the phone. Which means I am stuck with a very expensive cheap phone