JUST CANCEL MY ACCOUNT!!!!!!!!!!!!!!!!!

I have been trying to cancel our internet for 4 months!!!!!!!!!! I tried email, used their whatsapp system, spoke to a agent yesterday who said it has to be done via the website. The website puts me back onto WhatsApp and around and around we go again. We are no longer at the premises and the current tenant cannot get internet until Webafrica releases the line. Is there anyone there who could possibly advise on the cancellation process, one that does not involve that damn whatsapp system. I was on WhatsApp for 2 and a hours yesterday and told my sad story to 8 different agents before I just gave up. There is an autorespond on email saying they only use the WhatsApp System to communicate with customers. If you dial there number they put you on hold then an automated voice tells you to use their whatsapp system. I have tried again on the whatsapp system and no luck one hour later.