Poor service delivery

I went to the shop to do a sim swap, four days ago. I was told not to put the sim in the phone for 24 hours - which I've done. By the evening following the 24 hours the sim was not active yet. I phoned 808 to ask for help. I was told then that the person at the shop was supposed to tell me I have to phone to activate the sim card - this is bull, why go to the shop then? Phoned the shop the following day, they said they cannot find anything on the system that they activated the sim - no paperwork or anything (and I did complete a form!) . They told me a query will be logged at MTN and they will get back to me as soon as they received feedback. No call from them the whole day, therefore I phoned the 808 number again - they told me no query was logged and the sim on their system is the old one - thus the shop still did nothing!! Phoned the shop again this morning, they told me the sim is active on their side, but it is still not working in my cellphone. What the heck, please help to get me connected. I am fed up with phoning and getting ****py service