download speed dropped significantly after network upgrade

Xfinity just performed a network upgrade in my area. Download speed has dropped from 950mbps to <10mbps. Logs from my modem, not a xfinity modem, shows downstream power is -25dbmv which is too high, should be 8 or less. Last time this happened we eventually found out Xfinity increased our speed for free but this exceeded our modems capability so we had to downgrade to 800mbps to get everything working again. This time Xfinity states there has been no speed change and aren't sure what is causing the issue. Online support tried to upsell me to the xfinity router which I don't want and will also become obsolete in several months, tried to sell the x8 when the x10 is due to come out.

Store tech was understanding but couldn't do anything. He could see the signal issue to the modem but couldn't schedule a tech. I was put on a waitlist which is useless as it only gives you a 2hr window even though I am free for several days. You can only select 1 window. For such a large company, customer support from xfinity is terrible.

All of this leaves me in a bind as I need internet access for work when i am home, which right now is useless as I can't connect to websites I need. Really need another provider here in Auburn WA.