Gaggle of incompetent Technicians

I have had Xfinity internet for about 2 years. My service has, for the most part, always been stable, until 2 weeks ago. My download speed went in the gutter, my latency and jitter have been way too high for video chatting and working on a virtual desk. I have lost income for these two weeks, while Xfinity has sent 7 different techs. The first one advised I buy my own modem, to keep better speeds, so I bought a CAX80 Nighthawk, and paired it with my Lenovo Ideapad 5, built in November 2025. As the next 5 techs came, they upgraded my 40 year old coax cables and each told me my downstream was at 21, and should be at 14. Yesterday, while talking to the 6th tech, I was attacked by a pit bull, bitten, and thrown backward to the ground, injuring my head, as well as needing stitches for my upper thigh. Today, the latest tech came and changed out the broken pedestal components, and yet again, swears its great. Well, per the generic speed test, it does look good, but not when I use my jobs mandatory speed test site, Cloudflare. My modem still says I'm only getting 300 mbps download. As of tomorrow, I will be forced to take a 2 week leave, after which, I will lose my job for an unreliable ride to work. My choice now, either move or lose my career.