Cell C - Zevenwacht Mall gives the worst service...

I bought a new phone for my son and he is 12 yrs old, unfortunately for me the sim card he had in the old device was an old sim and it was too big and couldn't fit the new phone so i had no choice but to do a sim swap and boy was that difficult. The original sim card i did the rica on my name however it was actually my son using the sim card. I first called the helpline service and was told that i could just buy a new sim card, and then do the sim swap over the phone .... and this is where the wheels came off. I tried the call in method but failed my security questions and had to go to the nearest cell c shop with my id and copy of proof of address, which i did. At the shop i was asked the same security questions and also failed that i was told that i couldn't pass the security test because i didn't have the last three numbers dialed so i explained my case and the lady i called said that i had to bring my documents to the store and then i would get sorted....but that was not the case....after producing my id proof of address i was told that my id could be a **** i could have picked up the proof of address somewhere and they are unable to help me as i failed my last three number test.....i couldn't understand and so frustrated with the staff i insisted on speaking to the manager who very reluctantly helped me and an hour later, R15.00 out of pocket for another new sim i was sorted....That was the worst service i've ever gotten from a cell phone service center.