Here are TOP BEST RECOMMEND Store Credit Extension for Magento 2 Ecommerce

1. Landofcoder Store Credit Extension for Magento 2 Ecommerce

https://landofcoder.com/magento-2-store-credit.html/

Magento 2 Store Credit will make the process of purchasing and refunding easier and faster than ever by online credit. Admin can control the transaction from the backend and increase the interaction with customers.
Also, M2 Store Credit help you improve customers in your store by refunding with credit. It gives customers more reasons to come back to your store.
Customers can receive the gift using the store credit given by the admin. Also, Admin can motivate the customer to hold a credit by adding credit rate.

2. Aheadworks Store Credit Extension for Magento 2 Ecommerce

https://ecommerce.aheadworks.com/magento-2-extensions/store-credit/

Increase customer loyalty and process refunds with in-store currency

Keep cash in store
Refund with store credit in two clicks, and add a little extra to keep customers loyal and happy
Boost sales
Add promo credit to all customers at once and display discounted prices on all product pages
Make informed decisions
Update credit balance in few clicks and keep track of credit movements with transparent transactions grid

3. Mirasvit Store Credit Extension for Magento 2 Ecommerce

Store Credit & Refund Extension covers and automates most of your store activities, related to Credits and Refunds of customers. This is a simple, but an incredibly powerful solution thet allows you to get more loyal and satisfied clients. Turn returns and exchanges into Credits and save your time and money!

Launch credit programs in your store
Save time and money by skipping several steps in the refunding process
Use the extension during an exchange process
Convert returns into new purchases