Update: After 3 months talking to shopify support, they said it's not possbile to get the partial refunded amount back, so that means we not only lost the whole sales amount but also paid the customer or the bank $200, this is beyond bs.

A Customer opened chargeback for order in the amount of $250, we had partially refunded this customer $200 before the chargeback, but now the bank refunded the customer the full order amount $250, and not returned us the partially refunded amount of ...

We really should all sue Shopify, Shopify is essentially not doing their job to protect thier customer (which is us), do we have legal ground to do it? I am totally down to do it

This happened to us too, we lost $200 on top of the full order amount, Shopify also said there is nothing they could do, very bs,