Hi - I am at a loss as to how to book my ticket from lima to cusco without paying the 100% upcharge on the american version of lan.com. I have been trying to use my Citi mastercard and have tried inputting Puerto Rico as the country of issue for the credit card and passport, and also tried peru. Both leave me with a message that asked me to use a different form of payment bc there was a problem processing my card. I searched on here and couldnt find the answer and i am wondering if the format of the site has changed? I called my CC company and they have not even seen an attempt to charge my card so it's not on their end. Any advice for me? THANKS!!!!