MTN customer services

I paid my contract cellphone account at an MTN STORE at Mall of the South on 21st December 2023. Today is the 30th of December 2023 and that payment is still not reflecting on MTN side as a result they suspended my services. This is the second month with the same problem. I've sent 3 emails to their customer care centre with my POP and still no help. When you contact the call centre they cut you off or their systems are offline. That call centre process to assist is not user friendly at all for contract clients. The WhatsApp option they refer you to use is absolutely pointless. I've been a client of MTN FOR 20 + YEARS and I've noticed their decline in customer services. I cannot wait for my contract with MTN to end so I can port to another company. I've had enough with MTN