How to adjust the balance of AP down payment,if we have received the remaining balance back?

Hi Dear Experts, Please help me with AP down payment criteria when the down payment partial adjust against invoice and the vendor refund the due balance amount through check or cash.

My scenario is:

Made a down payment for 50K and made payment of said amount.

AP Invoice was only 48K, (linked 48K of down payment to AP Invoice)

I need to record 2K returned by my vendor.