Horrible experience and service and I'm not even a client of them

I app**** for fibre services from Webafrica and it took forever to get the process done. I then cancelled the application before they even made an appointment to come set the services up in my home. However I still get invoices from them and they still try and debit my account every month. When I try use their WhatsApp service, I never get assisted. This is affecting my record even with the bank and webafrica can't be bothered. Horrible service and experience I have received from them