I can see you got a refund, I'm guessing they didn't have the liquidity.
I see they have over 4000 Hive right now, so maybe try it again.
Try with 500 first if you want, and see what happens. I am not sure if there is a limit per transaction. I never did over 500 or so myself, but I have used it a lot without issue.
I see now that I have got back, maybe is a limit I will try just continue with 500. Thanks a lot for your quick answer!