Shocking service - still waiting after 6 weeks.

Shocking service after more than 15 years with MTN. I have been struggling for 6 weeks to get my upgrade package changed from Fixed LTE to MyMTN Choice. No fixed router was supp**** with the upgrade. I was told twice there is no stock available. I have been paying for data I cannot use. After more than 10 phone calls and a long email to customer services. I am still waiting in the the change to be made. The last 3 phone calls each time the operator says my request to change the data plan will be done within 48 hours. Nothing happens. And nobody calls me back to say why. Why must I pay but I cannot use what I have paid for? I am really annoid by all this.