Slow speeds on PS4 after upgrading

Hello, do any of you have this issue I’m experiencing and how can I fix it?

So I recently I upgraded to Cox’s gigablast and thought I would get amazing speeds on my PS4 console. Well that did not happen. My speeds are below 0mpbs via Ethernet cable. I can get 20-40 mpbs on WiFi but 0 upload speed. It still ** on WiFi. It takes awhile to obtain IP address and load the rest of the information while doing a speed test. On Ethernet cable, it connects right away but when it comes to the download and upload speeds, it totally **. I downgraded hoping it would fix the issue but the problem STILL remains. I regret upgrading because now I can’t game online. I never had any of these issue until recently when I upgraded.