Fly.cool customer service is Not so cool

I have been trying to get hold of them via phone and via whatsapp but I'm not winning, I registered for their services but they also changed my parent's address without my permission, now my mom and siblings are mad at me because they want to choose their own isp,but they can't since their address:4317 zakhi street Vosloorus is already under fly.cool, I need fly.cool to cancel the order they made under this address.