Webafrica and its atrocious WhatsApp service

About two weeks ago we started experiencing constant problems with internet connectivity. And no, it is not a technical error on our side. Back then one could still get a decent response on WhatsApp. When these fixes did not solve the recurring problem I decided to change ISP. Since Friday I have been trying, to no avail, to get both Webafrica's service AND the fibre line disconnected. I am constantly transferred between operators, with nobody registering my cancellation. I tried email and the help line --- they all refer you to the useless WhatsApp service. I expect to be called at ***, today still.