Cannot Access my account, or create new account

After signing in to Xfinity, I try to click on any tab like "My account" or "Change Plan" etc. it serves me a "hmm, this page didn't load correctly". I tried making a new xfinity ID with the same phone number as that was one of the solutions someone found in the forums, however, xfinity will not let me do this (I believe I actually successfully did this one time, but now cannot) as xfinity serves me a message that says "This doesn't match our records".

I am trying to buy service for a new house that I am moving into in two weeks, I am trying to give Xfinity money, however they are making it incredibly hard because I cannot get into my account. Even the online support chat line does not help because it requires me to sign in to get help, but I cannot actually sign in.