I am in need of a document / payment aggreement. The document must be “from” RD

I am in need of a document / payment aggreement.
The document must be “from” RD Fuller” collection agency basically somewhat stating that I have paid $400 toward a balance of $1139 and a payment arrangment has been made for the remainder $739 to be paid in full by December 2024.
here is the link to the agencies website for any details needed:https://rdfuller.com/
if applicable try to use the companies logo as a letter head.