Hair pulled out due horrible support structure

I have struggles for months now to get in contact with MWEB. I work for a company that uses MWEB Business for client internet connection in a datacenter. The datacenter has been experiencing issues for months now. Now the issue is this... When i phone MWEB i must type in the account number... Fine. Now it sends a pin to a number that is not in the company for some reason. Now I can't get in contact with a technician for assistance. If i can't even get in contact with a techy, where must i then get assistance from? I can't even email mweb as there is no email address i can contact on the website. If this goes on, then we will just stop paying the account and get a new ISP in there. Done pulling my hair out just to get in contact with a useless ISP.