At present, you're not able to process a refund for your customers from inside your Subbly admin. However, you are able to do that from your Stripe admin, which is connected to your Subbly. ๐Ÿ˜

So, in order to refund a customer (and you can process both full or partial refund from Stripe ๐Ÿ’ต), you will first need to go to your Stripe admin and search for the customer (you can use customer's email address to easily find his profile). 

After that, when you found a customer's profile on Stripe, feel free to scroll down a bit until you get to the Payments section. ๐Ÿ‘‡

If you click on a specific payment you will be taken to the payment view, where, in the top right corner of the screen you'll see the Refund button. 

Click on it, choose whether you'd want to run a partial or a full refund and confirm. 

You just refunded your customer ๐Ÿ‘๐Ÿ’ฒ