No delivery / No customer service

I have been trying to sort out an issue with MTN MoMo (car license) for 6 weeks. I have sent emails, & had a response that someone would contact me within 24-48 hours, but never got that call. I have received SMS's that there is a delay, however the service is quoted as taking up to 5 working days. It is now 6 weeks. I have also received emails, that when queried, I was told had been sent in error. Tracking the progress on the MoMo app, shows me that nothing has been done. I have been on hold at the MTN Customer Care call in centre for over 1 hour now, and also, no luck. I have paid for a service which is not forthcoming. Please can someone help me out, either by giving my money back, or by delivering the service offered?