MTN APN issue

I have been trying to get an unrestricted apn from mtn from start date of my business lte contract. Yet none of the consultants i speak to understand what i need done. I've been talking to people on forums who have mtnvpn as their apn and is working yet when i speak to mtn about it they say its not in use anymore. Which makes my life hard as i now have to use telkom for its unrestricted apn.