Why was Giamso Tours unable to process my payment? If your credit/debit card cannot be processed, please contact your bank or financial institution to resolve the matter. Was this article helpful? Can't find what you're looking for? Inquiry Form Related articles Can I make a reservation using my own credit card on behalf of someone else who wants to travel? Can I make a reservation for an unaccompanied minor? What are my payment options? Do I always have to use the same payment card? How can I get invoice/receipt of my payment?