Disgusted with Vodacom Advanced Repair Centre

I purchased a brand new Blackberry Q10 handset in October 2013. Ever since the first 6 months of the purchase, I have been booking in my phone to Vodacom Repairs which escalated the repairs to Vodacom Advanced Repair Centre. I had mentioned to them on numerous occasions that if the device is being booked in all the time for the same issue from brand new that surely it must mean that it is hardware related and not software related as they kept advising me. Eventually on the 16th of March 2015 my phone was booked in whereby Vodacom replaced my handset now advising me that it was a hardware issue. I have since been given 2 refurbished phones from them and both were sent back as it was faulty. I am yet to receive a reply from them and I do not have a device to use on the contract I am currently paying for! this the kind of service we must settle for? Not to mention that I am now waiting for the fourth device just on one contract! I am totally disgusted with this service!