Don't use Web Adr

In November my husband received an advert email from webafrica with the option to upgrade our fibre line for a discounted rate. We responded to take up the offer at this discounted rate. At the end of December, he was charged the standard rate instead of the discounted rate. He logged a ticket at start of Jan so that he can get a credit for the difference, and he was told that they billed us correctly and the discounted rate cannot apply to our account. But that was not communicated when we took up the offer. So he asked for a manager to contact him. No one has gotten back to him despite logging multiple service requests throughout Jan. At the end of Jan, he was again debited for the higher amount. On top of all of that, the cancel subscription option on their website doesn't work.