Upgrading Issues!!!!

Having endless issues with upgrading!!! I phoned MTN and was told I need to contact Mono. I contacted them... no stock of any of the 2 devices. I logged a complaint with MTN on 16 November 2021, received feedback 2 December with info that I need to contact the sales team. Mono advised that they can't give me a date when stock will arrive. At the end of the day I am an MTN customer... They advertise upgrade deals/black Friday deals, but they can't deliver. Why do I, the customer, need to phone MTN and Mono to get "answers".... The service received from MTN (And Bono) has been terrible!!!! Even our Supersonic wifi at home is unstable and no one can give us any answers!! What happened to customer service???