The problem with these shopping malls is that neither the airline nor the merchant make clear what either's relationship is to Cartera. This creates a confusing three-headed monster when there are problems with crediting mileage. Cartera earns a small commission on each sale that comes through its portal so it does not have that great an incentive to rectify problems. My recommendation whenever there is a failure to credit mileage is to contact all three parties (the merchante, airline and Cartera). The email address I have for Cartera is [email protected].

By the way, never seek a discount or bonus for a transaction that is not specifically covered by the terms set out in the shopping mall for the merchant. If you do, you deviate out of the shopping mall portal and will not earn miles.