Shocking and disappointing service

I am self employed, and my main source of income is my orders that I receive through calls or whatsapp via my cellphone. I am on a business package with 6 lines and I make sure my bills are always paid on time because I know how important my phone is. My phone was ****** on the 14/09/21 and I had done a sim swap at 3pm. Its now 8:20pm on the 15/09/21 which is over 29 hours and its still not done. I even went back to the store and their only solution was to wait for the morning for them to send an email to get it sorted out. The other explanation was that the system is down and it will take long to get a sim swap done which was suppose to be 24 hours. The disappointment comes in when a service provider cant take their clients seriously and yet advertise how good their service is, until you have a problem. Please understand that we have our banking app and whatsapp connected to the number and it makes business impossible on a new phone without your number. Well MTN this is disguising service, I have lost a lot of business and will continue to lose business until my sim card is working.