When you bid on an auction, your bank temporarily authorizes a charge. We don't take money from you. If you win the auction, the final bid amount will be charged to your account. If you do not win the auction, the bank will refund your transaction.
If you don't receive the refund from your bank, please contact them. Typically it happens relatively quickly (two days) but depending on your bank it may take as many as 45 days in some cases.