Mobile app and xfinity webpage is broken for me.

Hi, 

I am a new customer and now an "extremely dissatisfied and frustrated" customer.

I cannot use xfinity mobile app, accepts my credentials but gos back to login page. 
I can login to xfinity.com website, but my account, my bills and some other pages are not functioning at all. When I try to reach to my account page, website redirects me to an url ending with /?beta=1 and then gives an error, saying "hmm, something went wrong bla bla". Who put me into beta users group? Maybe your authentication servers are failing or the beta page is not functioning properly, I do not know.

Since I cannot use Xfinity mobile app because of the problems listed above, I cannot even change SSID or password of my Xfi gateway. I can log in to 10.0.0.1, but some functionalities are disable and can only be controlled via mobile app. What a ridiculous decision.

I couldnt do my own activation because the mobile app is not working for me, I called Xfinity customer care and they were a joke, representative kept asking which devices were connected to my gateway. My internet was not active yet :) After spending 2 hours on the phone, I begged to get in touch with a customer care agent supervisor. Agent kept asking me irrelevant questions like did you checked the cable on your gateway, I am telling them that I cannot login to mobile app and cannot activate internet service :)

Can please an educated support engineer solve my problem please?