email only shows messages received today and yesterday - I need older emails

How are you accessing your email?  With just the webmail UI and a browser?  Or a client like Outlook or Thunderbird?  Something else?  Did you try running a search by date range for the older messages?

I've been using Outlook and the webmail UI interface.  They both show only today and yesterday emails.  If I search for older emails - neither app finds them.  It's like they are removed.

It's super frustrating and is causing me major problems.

Is there a way to DM the Xfinity people perhaps??

Is there a way to DM the Xfinity email people ??

I'm going to escalate this to an employee to see if we can get some traction on the issue for you.  You should see a response here in this thread.