Hello Huggernaut,
Your card is being declined due to 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. What you are seeing are not charges, they are authorizations. Each time you tried to submit the order the bank was pinged to make sure the card was valid. When this happens most banks will 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 these authorizations. If not finalized authorizations will expire and the holds will be released. How long this takes is entirely up to your bank and not something we can control.