Xfinity Mobile billing problem help needed--two weeks of frustration already!

I am unable to get a detailed billing statement for my recently ended Xfinity Mobile billing cycle.  Every time I try to access the statement that breaks down usage by user on my Xfinity Mobile account, I get the message "Something went wrong." 

I have tried it repeatedly over the past two weeks and always get the same result.

I have tried calling Xfinity's customer support twice and have spent over an hour on the phone with them.  They aren't able to access my detailed billing statement either.  On my call with them yesterday, they said they wanted to continue working on the problem but after about 30 minutes talking with them, they said they didn't want to make me stay on the phone with them and would call me back in an hour with an update.  I never received a callback.

I have also gone into a nearby Xfinity store and spent about 30 minutes talking with two employees there who also called their internal tech support when they couldn't access my detailed billing statement either.  They opened a support ticket (I have the number) and said to check back on it in a day or two.  Which I have, and the problem is continuing.

I need some help to get this billing mess straightened out.  Can someone help me?

Thanks.