Need Technician - Xfinity Assistant Doesn't Work

My wired upload speed is 4 Mbps on a 35 Mbps plan, and my download speed is fluctuating. This started immediately after a recent outage. I’m using an XB7 gateway. This is a service degradation and line or node impairment, not Wi-Fi. I need a technician ticket opened to check upstream signal levels to the tap and escalate to maintenance. Please assist.