Credit cards can be refused for a number of reasons. In general Bookafishingcabin.com  is not informed of the specific reason.
Common problems
Check whether:
you have entered your credit card details correctly
your credit card has sufficient resources
your credit card has not expired
you have entered correct CVC-code
Contact your bank or credit card company
If you receive an error message when you try to pay, we recommend that you contact your bank or credit card company for more information. Inform them about the amount and when you have tried to make the payment so that they can complete the transaction.
If your bank or credit card company is unable to help, you might try a different payment method.