SIM Swap mess and absolutely no effort to help me

I recently moved over to MTN after being with Vodacom for many years. I completed my application on the phone, and I explained that I wanted to do a SIM swap. The person on the other side told me that I could do that once my other sim had been activated - I just had to call and they could change my number. Once my MTN SIM card was finally active, I tried phoning MTN several times and just held on and held on and held on until eventually the calls were cut. I then went into the Gardens center and was told, quite rudely, that there was nothing that I could do because that SIM swap had to happen when the application was made. How is it that two different departments in the same company have two different pieces of information? And that now I cannot have my old phone number?!?!?! I now have to change all my contact details on every account that I have and for all my phone contacts. This is absolutely ridiculous. It is utter bull****, actually.

I understand that there are rules, but the service that I got was very surprising, with absolutely no sympathy for the agent in Gardens. No effort whatsoever to help me. Nothing. It is unbelievable.

I was told that I would get a purple phone (since the blue one was no longer available). I got a pink one. This is not a big deal because whatever, but this just adds insult to injury.

I need someone to make this right, please. I need to have my application redone so that I can get my previous number. It is unacceptable that I have to change my whole world just because of service agents who don't know what they are doing.