Can't add a new service at a new address.

I'm struggling to add a new service at a new address I'm moving to. I haven't had Xfinity for about a year and there are still two accounts linked to my Xfinity account at two separate addresses. When I click on the "look up your new address" button, it redirects me to a "You have more than one address on your account" page. Upon clicking on the latest address, it navigates me to a "Looks like you can't make changes on this account" page. I've reviewed my latest bills and have paid everything to my knowledge. I need to get in contact with a representative since the websites does not work and is overall incredibly buggy to the point of being unusable. Thanks!