Can't log in to account on website or app - unable to activate new modem

Hello,

I need help logging in to my account and activating my modem and I am at my wit's end with trying to get help. I have tried calling and using the xfinity assistant, but I am unable to log in, so neither are helpful. I was able to get a live chat with a human yesterday, but I have no idea how I did that, and it was not helpful. 

My issue is as follows:

I created an account, but every time I try to log in on the website it goes like this: Enter phone number --> Enter code --> Enter address --> "Something unexpected happened" message and I can't log in.

I was struggling with this, but I still wanted new internet, so I was able to chat with an agent. The agent was able to order the modem for me, and assured me that I should be able to get into my account after that. 

The modem arrived. I tried to activate it using the app, but when I log in to the app I get the following message: "Access not Authorized. You signed in successfully, but you must be an Xfinity user to enjoy this service."

So now, I have a modem and a plan, which I purchased using my phone number, email, and BANK ACCOUNT (!!), but I can't use it. I keep getting sent in loops trying to log in. The Xfinity assistant has been of no use, as it does not know how to do anything other than link me to help articles. I cannot call customer service without logging in, which I cannot do. I cannot link my 'accounts' (which I saw may help) because I cannot log in. 

If an xfinity support member is able to delete my account, I would greatly appreciate it, so I can hopefully start over. I feel like I am going crazy. I just want to be able to use the product I bought. 

Please help, I feel crazy!!

Thank you for your time!