Shocking Service, S4 sent for repairs

Such disgusting customer service. I sent my phone through for repairs at Samsung Mall of The North, I then received a quote from the repair centre and when I went through the quotation I then realise that it was not mine. I quickly phoned the repair centre and I requested them to send me the correct one. They immediately forwarded me a quote that included fixing a cracked camera that functions very well, a crack that was overlooked when I sent my phone in for repairs the 1st time around. Now I am forced to pay R1050 for it. I requested that they fix the screen only and they told me that its against their policy. I then phoned Samsung to discuss my unhappiness and that's were the nightmare started when I was being transferred from Agent to Agent pretending to be managers. All that I was stating in the calls I had made was not even captured. My query was escalated to someone and I am still waiting for the call. When I spoke to the repair centre and asked what the problem is, I was told that that crack \could"affect the phone....Not a definite answer and I'm expected to pay for a possibility. The service from these people has only been but a nightmare. Their stories change always"""