Terrible Connection Through Xbox Live

I'm having issues with my Xbox One and Xbox Live. My games lag so much they're unplayable. It's most noticeable in sports games. I used the built in speed test on the Xbox One and my download and upload speeds aren't the problem. But every time I tested it the ping was 80ms or higher with the latest tests at 110ms. I don't know why it's so high. I'm connected through WiFi and not that far from the router. I tested from my phone and the ping was a decent 25-30ms. Any ideas? This issue just started recently. 

You would think for how much they overcharge us they would give us at least decent equipment/speeds.

I'm thinking they might be throttling the speeds because when I download files they take forever. I downloaded a 1.4GB file and it took over an hour. It shouldn't take that long with 15+ Mbps.

Reading the Xbox forums this seems to be a common issue with Cox. This is seriously the worst cable/Internet company I've ever had. I wish I wasn't forced to use them...