How long does pending transaction payment clear on debit card?

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I brought a Visa OneVanilla Prepaid Card. I made a transaction for about $39 and they I cancelled the order on the same day. The website said that they did not charge me. That was last Saturday. Now it is Tuesday so it's been about 4 days. When I log on to my credit card online, it still says pending transaction and my total balance is subtracted by $39. How long will it take so I can get back my $39?

How long does pending transaction payment clear on debit card?