2 gateways - 1 address

I have 2 gateways at home - one for work and one for everything else. I do not have an option to manage each gateway - I'm forced onto the everything else one no matter what I try. Customer support can't help - they keep telling me to link accounts that are already linked, sign in, sign out, try again, repeat. This seems like it's been a problem for YEARS - I am paying for 2 gateways and I should be able to manage each of them without spending HOURS AND HOURS with a rep that just send me the same useless article! 

Complete failure on Xfinity!!!! You need to fix this!!!