How long does it take for a store to refund/give credit back to a debit?

I'm not sure if my question makes sense..but this is what happened... I recently returned an item at H&M and asked for a refund, which is supposed to give me back credit on my debit card. But...when i checked my transaction history on WaMu it did not show up...am i supposed to wait at least 24 hours? If it... show more I'm not sure if my question makes sense..but this is what happened...

I recently returned an item at H&M and asked for a refund, which is supposed to give me back credit on my debit card. But...when i checked my transaction history on WaMu it did not show up...am i supposed to wait at least 24 hours?
If it doesn't show up in at least 24 hours..what should i do?
><

thanks in advance!
Update: Thank you everyone for the responses =)
I guess i will wait a few days..and if it still doesnt show up then i'll ask H&M.

Thanks again! ^^
-xtine
11 answers 11