This is such a clusterfuck I don't even know where to begin. I am very happy that "pay money" for DV SSL certs is going the way of the dinosaur, with Let's Encrypt.
The only SSL cert you should ever pay money for is $90/year for an EV SSL cert for an ecommerce/product purchasing website where people are entering credit card details. The big friendly green bar GUI element, for non-technical users, is worth it.