Modem provisioning issue and speed mismatch

ever since i upgraded my plan to the highest tier i have been noticing issues and it seems like customer service and the techs don't really understand. When i upgraded the website showed symmetrical speeds of 2000Mbps then after i upgraded i was sent the attached summary, which clearly states those speeds. Now the app is stating that i only get 250 Mbps and the website says 300 Mbps, so I'm trying to find the disconnect. However, my main issue is there is some sort of bug on Xfinitys end with the modem provisioning where there is a hard cap on my upload speeds at exactly 40 Mbps, I had a tech come out and test the speeds, i have gone into my modems admin page and confirmed everything is configured correctly. i keep getting assured everything is working correctly but thats hard to accept when the speed im getting is 8% of the speed im getting to the outlet and 2% of the speed i was told i would receive. there is something off here and its the principle at this point.