Mweb doesn't care about customers

I signed up for fibre services, I was surprised to find out that they are supposed to send me a router but I have one already. Trying to contact them has been bad. I can't have an account with a customer service that doesn't work. I would like to cancel my order but no one from their side is willing to help. I called for 30minutes and they did not answer i was stuck in their avr, then I sent them messages using Facebook but they are not responding