100mbs, running beyond super slow....9.45mbs

New service, have the best router that Cox offers and the "fastest internet".It is beyond slow using ethernet or wifi. I signed up yesterday and picked up my router, it was running at 37mbs last night and today. I called the tech line, no help. So today I went back to the cox location and swapped out for a new router...now the speed is maxing out at 9.45. I have a tech appointment tomorrow evening, any help that anyone can provide in the meanwhile? This is absolutely ridiculous.

I have tried alternate cable hookups in the house, I have tried multiple devices, no difference. Definitely not what I signed up for or what I was expecting by any means.