VOX providing terrible customer service

I recently tried to subscribe my mom to VOX for fibre services, and the customer service was horrific. They do not answer phone calls. They ignore emails. There is no way to get hold of them. I made a payment of R670 3 weeks ago and I still do not have fibre. I have decided to cancel my order, via email and via whatsapp, but they have chosen not to respond to my correspondence. I did provide my banking details for debit order purposes, and I do fear that they may try to debit my account even though they have failed to do the installation for the past 3 weeks. At this point I would not recommend signing up with VOX.