If a payment is processed more than once to a finalized order, the download links may not be available after the purchase. As a result, they will show up on your banking account as “Pending” transaction(s). Financial institutions normally release the pending transaction(s) within 10-12 days; however this depends on the financial institution.
Contacting your financial institution to dismiss the pending charges sooner should assist with making the downloads available. If the "Available Downloads'' are no longer available within the account page, then the payment was most likely declined.
Confirm that your correct credit card and billing address is still listed within the "Payment Methods" section of your account page. If this information is correct then you will need to contact your financial institution for more information as to why the payment was declined.