CellC fixed LTE switch to MTN

Was informed that CellC fixed LTE is discontinued and that axxess will be moving me to MTN fixed LTE same package same price. Got the new sim and a new router, was feeling very happy with all of this. Until I actually try to use the MTN sim. I got an error saying "Connection failed. The profile is invalid. Please contact your service provider" so I leave it for a couple of days, reboot router a couple of times, no dice. Eventually I log a ticket, an agent suggests I switch to 3G, so I do this and leave it another couple of days, still no connection. I keep asking for feedback to no avail, they just say it's an issue with MTN. Now I'm sitting with no Internet and cannot work. Great stuff Axxess. Luckily fibre is almost done in my area, will be moving away swiftly.