Website keeps logging me out

No I haven't because I'm not sure if the plan went through online

I get an "Access not Authorized" when I try to log in on the app.

I looked up the account you logged into the Xfinity Forums with, user_1pgsf7. The order is pending and ready for equipment pickup. The date is not set for when the order should complete which may be causing the Not Authorized error. Your Xfinity ID is set up and active so you should be able to view your account in the app and online once it is activated. The store agent will add the date and complete the order so you are ready to go when you return home with the equipment. Make sure to bring picture ID with you so they can release the equipment. 

Hello @user_fxobu2, thank you for your comment. Thanks for providing the steps that you have already taken with your login issues. If you could send our team a direct message with your full name, the name listed on the account (if different), and the service address associated with your account, I'd be more than happy to look into this for you.

 To send a Direct Message, please click on the “Direct Message” icon in the top-right corner of the screen, next to the bell icon, click the "New message" (pencil and paper) icon, then type or select "Xfinity Support". Type your message in the text area near the bottom of the window and press Enter to send your message and initiate a live session.