Appalling Service @ Clearwater mall Vodacom 4U

I bought a brand new Samsung S6 edge with a R1000 cover for the the phone, when I got home the cover was faulty. I went back to exchange the cover and they told me they were out of stock, they can give me another colour. I refused and they then said they will order a new one and contact me. It's been a month later and I still haven't heard from them, so I phoned them and they told me they have it and I can pick it up. When I got there today they STILL did not have it, told me they need to order it ONCE again and it will take another month or so. So I then proceeded to call customer care where they then told me that they can't help me. So now hopefully Hello Peter can.