Xfinity Mobile sent a new sim card to a scammer, who used this sim card to take control of my Father's phone and 2FA SMS

Last Sunday on January 5th, scammers successfully took over my Father's Xfinity Mobile service by apparently placing an order with Xfinity for a brand new sim card to be mailed directly to them.

What happened was, these scammers successfully infiltrated into my Father's primary email account, and them from there, they took over his Xfinity account, his Google account, and various bank accounts.  They even opened up a Coinbase account in his email address and transferred funds from one of his bank accounts.

The scammers successfully had access to 2-factor authentication.  And, I later found out that the scammers put blocks on incoming emails from Comcast, Xfinity, and Xfinity Mobile domains within his primary email account so he would never be alerted to these happenings until they unleashed their "Blitzkrieg" early Sunday.

However, Xfinity support was of very little support.  They recommended that he travel to an Xfinity store over an hour away.  He did, and the staff was relatively unhelpful, as they had to call customer service.  He then called customer service, who told him to travel to an Xfinity store, if you can believe that nonsense.

Apparently they locked his Xfinity Mobile account for 2-weeks, so it can't be used.  When we login to Xfinity Mobile, there is an Apple iPhone listed.  His Samsung Galaxy phone is no longer listed.

So now, he can't access any of his accounts, and has no phone.  Therefore, he can't gain access or reset any passwords because of the lack of ability to receive 2-factor authentication SMS.  Additionally, he can't even gain access to his phone, because without 2FA, he can't reset his Google Password to unlock his phone!

No one seems to be able to help as if this is the "first ever" time something like this has ever happened.  What can he do??  We are at a loss, because it seems like there is a Catch-22 around every corner!

Lastly, why in the heck did Xfinity Mobile ship a sim card to someone whose address does not match any of the addresses on file within his account?  This seems like an enormous security flaw and lack of judgement on the part of Xfinity Mobile.  Shame on you!