Worst Customer Experience

I upgraded form the SamsungNote 4 to the Samsung GalaxyS6Edge, I asked the sales consultant if I needed to do a sim swap, he said that I did not need a sim swap. This was the first GalaxyS6Edge that he had sold. I went home and put the sim card in the sim slot, the sim obviously got stuck, because it requires a Nano sim(as I found out later). I took the phone back to the Vodacom shop, and asked if they could please remove the sim, the phone was sent in to the Potchefstroom repair center, after several inquiries, I was told that it would cost R4800 to repair the sim slot, that was apparently damaged when I inserted the phone. I was told that the sim card I had would work on the phone, so I had no reason to doubt that I would be able to insert the sim card without a problem, I do not believe that I should be liable for these charges, as I was misinformed by the sales consultant, the staff at both the Brooklyn branch as well as the head of operations at Hicell, have been of no assistance, and are intent on making me the guilty party, this has been the worst experience I have had with a service provider to date. From the start the sales consultant's word was taken over mine.