Afrihost LTE no service

Signed up for LTE with these guys for my parents. The router and SIM arrived, but the SIM doesn't work. If you call them, the agents are very friendly, but the issue just gets 'escalated' by one team to the next with no actual progress. Also, no-one seems to act on this 'escalation' until the next time you call. I've spent days on the phone and on Whatsapp, with no resultion in sight.

The one thing they do seem clued up on is their cancellation terms. If you decide you've had enough and want to return their router and cancel, you get hit with exorbitant cancellation fees. The fact that they never provided the service you signed up for doesn't change this.