I talked to Delta and they said the tickets I purchased in Buenos Aires were all settled financially with the travel company in BA and Delta. The contract is now between Delta and myself. Explained to Delta what the piece said about the 20% retractive thing and they said the Buenos Aires travel agency is now out of the picture. They assured me more than once that the deal is closed. Do not know what to think anymore.My travel agent confirmed that travelers that had purchased international tickets before March 18th. when the 20 % surcharge was decreed , had to pay it before leaving, All future surcharges will also be applied before departure date. If you bought a ticket for next Christmas season.