VOX from bad to worse

I was unable to receive emails today I spoke to my Hosting company and they confirmed that my emails are there they tested the IP on mxtoolbox.com and the IP was blacklisted, unplugged the router and got a new IP which was also blacklisted and the blacklisting is preventing me from receiving emails. I spoke to Brandon and he then decided to reset my incoming and outgoing ports as he cannot see that the IP is backlisted. After some research, I found out that Vox assigns random ID addresses and for the entire day all the IP addresses assigned have been put on the blacklist. How do they assign blacklisted IP's to customers? and I am still waiting for a Senior Technician to give me a call 1 hour later, really now. Vox was one of the best ISP but they are going the same route as Eskom and Transnet.