Continuous issues with device.

I have had to book my device in at Vodacom canal walk technical dept on two separate occasions because of an APP error I have been getting. Bear in mind that this device is not even 2 months old yet and conveniently only started giving issues once out of the 7 day return period. The last time I booked this device in I made it VERY CLEAR that I did not want this same device back because this is the second time its booked in for the same issue and there is ZERO guarantee that this wont happen again. Vodacom Canal Walk REFUSED to motivate for a new device and quite frankly the Store Manager, Pierre simply agreed to do so in order to shut me up. I have been given the run around by Vodacom Canal Walk since day one. They have done absolutely nothing to compensate me the inconvenience of have to sit without a phone every time despite claiming to do so.....Data never receive, that was a lie. The agents who call say things just to make it seem as if Vodacom cares when in actual fact there is no follow through and no consideration for the customers. Vodacom Canal Walk was very quick to make a sale but useless at after sales customer service. USELESS!!!! I have 2 contracts with vodacom, I want both contracts cancelled because quite frankly I refuse to pay for something that is not working optimally. I have been inconvenienced one too many times by Vodacom and specifically Vodacom Canal Walk. I have literally had it with you lot. Time for talking is over so don't bother. I am putting the lot of you in the papers next.