Terrible service from technical department

I've been trying to activate the MTN unrestricted APN on a prepaid MTN SIM card in order to enable port forwarding on my router for over a week now but MTN's technical support has been totally useless. They keep transferring me to different departments or putting me on hold indefinitely. The prepaid call centre numbers they provide have no option of speaking to an agent either and all you get is automated responses back. When I request to speak to a supervisor, the agent puts me on hold for 30+ minutes so I end up having to hang up. The agents do not seem to know about the product offerings by MTN and what an unrestricted APN is which is appalling for a "technical" department. I switched from Vodacom to MTN and this whole process is a night and day difference between them. Vodacom knows exactly what an unrestricted APN is and activated it immediately over the phone whereas MTN agents are clueless.