New Account; "Something unexpected happened" when accessing account information, unable to load plan information

I'm a first time user & customer of Xfinity trying to purchase a plan. Just went through the process of browsing plans available in my area, picking a plan, date for installation, entering payment information, and creating an Xfinity ID. Right after getting my ID created checkout failed without a reason and I could not proceed. I went back to the main Xfinity website & signed in with my newly created ID. 

I get "something unexpected happened" whenever I try to access "Account & Identity" or "Update Contact Info".

If I try to go to "Manage Plan" > "View & Manage Current Services" I end up getting a page that infinitely reloads itself until I get access denied for the excessive requests.

I have tried both Chrome & Firefox in regular windows as well as incognito windows. Clearing cache of course has no effect on this issue. Per the browser console I am receiving error 403: Forbidden whenever I do get the "something unexpected happened" page which is coming from the server and not the client.

Could someone please assist with correcting this inexplicable issue on my account?