xfinity gateway hack

Received a phone call from someone who said they were xfinity security.  They had me go into my gateway and he showed my security setting was low and I was hacked.  I asked how to change security setting and he said he had to install anydesk so I did.  Unfortunately it took a few minutes for me to figure out he was a hacker so I don't know what he stole.  I shutdown my computer and turned off the router then wiped my computer and reinstalled windows.  I've also been changing all of my significant accounts.  Everything of worth requires 2FA so hopefully it'll protect the account.

Is there anything else I should check or do since he had access to my computer long enough to steal stuff.

Took a picture of the guy's alleged info:

Xfinity Internet Security

Name: Frank [Edited: "Personal Information"]

Technical Support Expert.

Agent-Level:5

Agend ID: [Edited: "Personal Information"]

Comcast Cable, One Comcast Center

1701 JFK Boulevard, Philadelphia, PA 19103

Had my account name, number, address, and uses of internet (like shopping, online banking, etc.) so I'm assuming they pulled that up from scanning my computer.  Part of their scare tactic was to show me what was breached, including hackers using my ip for porn, stealing $18K crypto, access to venmo, paypal, etc.  

I asked "Frank" for his phone number to call him back.  It was [Edited: "Personal Information"].  I shutdown after he took control of my camera.

So, what else should I check/fix to protect our home internet and accounts?  Our internet seems slower than before, but don't know if it's due to an outage or something.  I'm thinking I should factory reset the xfinity router/modem.  Also, xfinity should have all routers default to high security, not low.