Worst service experience by MTN

I made a contract sim swap at MTN branch store code 0874 in Mokopane on the 10th and paid R115. I was told the sim swap will be active after 4 hours and if not It will be active in 24 hours. The sim card never worked in those hours, i went back to the store and i was told they logged the problem for me and i should check every 2 hours until the 24th hour it will be active. The sim card still didn't work, I called customer care hoping they could help me, but they too said they logged the problem for it will be active within 2 to 24 hours. I went back to the shop and explained calmly and patiently that until today no one is solving my problem and I use this number and really need it to be active. Again they told me now it will work I should give it another 2 hours of checking. At this moment I'm getting SMS on an alternative number saying I must reply yes if I want the sim swap and those SMS I'm receiving every hour of every day. I then called in again and customer care said they fixed it it's working I must put it in the phone after 6 minutes, I did that and nothing happened until the next day. Today on the 19th July I went to mall of the north to see if they can help, they told me that they are a franchise and can't help me in any way, I must go back to where I initially sid the sim swap. I stepped outside and called customer care again to explain my situation and they also told me that they will log the problem for me and in the meantime I should go back to the store. I drove from polokwane to mokopane just to see this fixed and when I got there I asked for the manager named Zanele Phungula and she had nothing different to tell me but be defensive about my frustrations. MTN is bad with their service and there's no proper channels for anything and no complaints department or escalation department to handle matters like this, just the customer care that does nothing to resolve problems. I'm very much unsatisfied with your service and it shows your unreliable when it comes to customer satisfaction and quality services. I was being helped by another person through customer care while I was standing at the store and said this time they logged my issue to technical and assured me by tomorrow everything will be fine, if not I'm canceling my contract and going all over social media about your disgusting customer service.