SIM swop issues AGAIN

I did my upgrade and got the Samsung S6. I had previously had an issue doing a sim swop on my s4. I paid R120 for the sim card. The guy at the shop told me 2 hours<br> It has now been 15 hours and my phone still doesn't work. The call centre said they cannot help me. I emailed customer care with no response. Why does this happen everyone I do a sim swop?!?!?! This is pathetic. I cannot be contacted telephonic ally as my phone doesn't work.