Cannot log into MAX app on X1.

I can no longer stream HBOMax on my X1, Apple TV or iPhone. I cannot link it to my Xfinity account.  I spoke to HBOMax help and they said my account was terminated by Xfinity. I contacted Xfinity and they said my account is in good standing and that because this is a third party app they cannot help, only HBOMax can fix this. So 4 hours of circular conversations has not resolved the issue. I have seen this problem before from internet searches but I did not see a resolution.  Has anyone seen this before and if so do you have a solution?