Need a way to get an XER10 to upgrade XB7 and get proper speeds

Heya, its crazy that im turning to forums for something like this but calling comcast/xfinity and waiting on hold, fighting the automated system, and dealing with people who are all saying different things has brought me here.

So I have a 2000up/2000down FIBER plan with comcast xfinity right now. The XB7 is only delivering about 600/700 (1/3rd of what I am paying for). The reason is because the XB7 only has 1 port above 1g, and that red port is used for the nokia fiber epon thing.

The XER10 has 2x 10g ports (1 for epon, 1 for WAN) but everytime I call in to try to get this thing ordered I get told something else.

1. "we need to send a tech out and schedule an apt 2 months forward"

2. "we need to run some tests and reboot( change your current working plan)"

3. Have you tried going to the Xfinity store? (they dont have XER10s there)

4. some other reason why they can't do it and trying to sign me up for a mobile plan.

So, I am hoping to reach someone at comcast/Xfinity who has some power to be able to get this thing ordered.