@Dogfish How did you do your refund?
If you haven't can you try this method:
Go to https://play.google.com/store/account/orderhistory then Click 3 dots on the right side of the game you want to refund > Report a problem > I no longer want this purchase (or any other option according to your case)
I did it for GRID through this method and got my refund almost instantly
Google still hasn't gotten back to me yet...
Pretty disappointed.
@Dogfish Have you tried the method I described above? I didn't have to go through support to get refund for my GRID purchase.
That didn't work but I got back into chat with Google and they helped out finally... Not sure why the first guy who chatted with me couldn't help