Hello ShyestSun,
You haven't been charged for anything. Your card is being declined because it is failing the address verification system. Usually this happens when the billing address attached to the card does not match what the bank has on file for it.
Each time you try to submit the order your bank gets pinged. When this happens most banks put a temporary hold on the funds, which can look like a pending transaction on your end. Because the card was declined we cannot finalize those authorizations. If not finalized authorizations expire and the holds are released. How long that takes is entirely up to your bank.