Supersonic - Over-priced and Under-serviced

I have contacted Supersonic on 08 February regarding an upgrade to my internet provided by MTN. I have asked that the upgrade be immediate as I am currently paying R1,549 for a 200Mbps line and the upgraded line is R1,299 for a 500 Mbps line. I have called them 5 times and every time they escalate the issue. I have received my invoice for March 2024 and it still shows the higher amount for the lower package. This is unacceptable customer service as they are taking their time with the upgrade resulting in a higher cost to the customer.