I had booked a return flight with check in luggage included. However, upon changing the date of my return flight under the same conditions, the check-in luggage disappeared from the view under the booking in my Latam account online. To avoid problems at the airport, I paid for one extra check in luggage, which didn't show up in my booking either. Concerned, I called the Call Center, and they told me they could see both the luggage included in the fare plus the one I had purchased additionally a few minutes prior to calling. I told them that my refreshed booking still said 'zero check in luggage'. They insisted I had 2 suitcases, but refused to refund the additional one, which I didn't need and I had only purchased because the original one included in the fare was not visible to me. The person on the phone told me their colleagues at the airport could return the second suitcase, as I was only checking in the one included in the tariff. At the airport, Latam staff told me this was not possible and the person on the phone should have returned the cost of the 2nd check in luggage to my credit card. I made the flight with one suitcase and paid for an extra unused one, which Latam is refusing to return insisting that 'it had been used', even though I have a fare with one suitcase (a PDF confirmation) plus a purchase receipt for the extra, 'unused' suitcase. Basically, Latam owes me USD 50 for a service not used that they are refusing to return and that is absolutely unacceptable.