Inbox / Sent / Trash / Deleted emails that were permanently deleted keep coming back

I have had this issue for a few weeks now.  I have called Xfinity Support, was on the phone with Level 1 Email Support for about 1 hour, and the Support agent would not transfer me to Level 2.  I believe my Xfinity email files are corrupted on the Xfinity mail server.  I need someone at Xfinity to rebuild my email files / account on the Xfinity mail server.  Note that I have 2 active comcast.net email accounts.  My primary email account has been fine for multiple decades.  My secondary email account has been fine for multiple decades until a few weeks ago.  Can someone from Level 2 or higher Email Support please reach out to me.  I will also be going to my local Xfinity Store to see if they can help me.

To confirm that my Xfinity email account is corrupt, I first moved all of the email messages that I wanted to save to local folders on my Windows desktop computer.  I then permanently deleted every email in my Inbox / Drafts / Sent / Junk / Trash / Deleted Items / Junk E-mail / Sent Items folders. I logged into my email on connect.xfinity.com.  I confirmed that all mail folders on connect.xfinity.com and my Windows desktop were empty.  Randomly, within 15 minutes to a few hours later, two events occur.  (1)  Inbox and Sent on connect.xfinity.com would display new (bolded) message counts to the right (e.g. Inbox 9 and Sent 87), but the folders would be empty.  After a few refreshes on connect.xfinity.com, the new message counts would just disappear.  (2) Randomly, when my Windows mail app would receive new messages from the Xfinity mail server, some messages that I permanently deleted in August, September, and October would be downloaded into my Inbox, Sent, and Trash folders.  I would then have to permanently delete them again and again and again, etc.

Can someone from Xfinity please reach out and help.