Letter re: charge for a problem at my apartment

I would like to retrieve a letter, my response to an inquiry about an invoice I received on May 01/18.

I saved my letter in Word Pad,, my first use of this program.

How can I retrieve a copy of this unfinished document easily?

Sincerely,

Miriam S. Erickson

Email Removed">Email Removed.

I would appreciate a quick response in order to settle this issue.