When a dispute resolves in your favour, the escrow returns to you rather than releasing to the vendor. Here is what that looks like.
Full and partial
A full refund follows an undelivered order or a clear vendor failure. A partial refund follows an order that arrived but fell short of the listing, where the moderator settles on a split. Both are decided from the evidence and the message thread.
Where the coin goes
A refund returns to your market balance, from which you withdraw to a wallet you control. Keep the balance small between orders regardless, so a refund is the only thing sitting there rather than a stack of unspent coin.
After a refund
Read the vendor's dispute history in light of your experience. One bad order can be noise. A pattern in the recent ratio is a reason to avoid the vendor going forward.