Free Minutes Missing

I took out a MTN MyChoice 8GB contract in November 2022, of which I was to receive 100 Free minutes, however I haven't received any of my Minutes and I have been transferred from one department to the other, each department telling me that I need to speak to the other department, Customer Care puts me through to Retentions, Retentions puts me through to Allocations, Allocations puts me through to Sales, at this point I generally put of "silent hold" then get cut off. I've tried to escalate to a manager but get told manager is on another call. I don't know what the best way forward is. My monthly invoice quite clearly states the contract date and that I receive 100 Free minutes. Empowered, is the company that did the upgrade. E*******h H****n was the consultant. However my contract is with MTN