Vodacom damaged my phone

I have a iPhone 6 Plus 64GB<br> My facetime camera started shifting on my device.<br> I took the device in within the warranty period and the device was replaced. I then had the same problem with the replacement device and took the device back within the 3 month period given by Vodacom.<br> My device was not damaged in any way.<br> I then got a responce back from Vodacom that the device is bent and does not fall under warranty anymore.<br> It has been 2 months since I handed in my device and Vodacom is refusing to do anything regarding this problem after they damaged my device.