Faulty Samsung S6

I upgraded to a Samsung S6 and its been hell. I started complaining about the phone less than a month after receiving it which was 10th May. Since then the phone has been going back and fourth between me and the Repair Centre for more than a month now ( 15 June to 20 July today) with the technicians still not finding any fault with the device. <br> I have requested that I get a new device, the same made and brand still no joy. Based on the that, I have decided to stop the debit order from the 1st of August going forward and to also suspend the use of my sim-card until we can come to an amicable solution. I find it difficult to pay for something that I am not using. <br> <br> I signed a contract with Vodacom with the agreement that I will pay every month for 24 months for the device and the other benefits included in my package however I cannot continue paying if I am unable to enjoy the full package of the contract and the Vodacom fails to resolve the matter.