Can't upgrade?

Please could someone, anyone, from WebAfrica contact us in connection with Vumatel fibre: bct79@wa*** - we are simply trying to upgrade. Requested the upgrade on 3 Dec and still waiting. We were told it takes 24 hours to kick in. Still hasn't been upgraded. The chat bot doesn't help and I've been "registered for call back" twice but no-one calls back. No idea how to contact anyone. What do we do?