I have a different type of problem. I put my Delta number in the reservation when I bought the Latam ticket. Later on I wanted to change to Latam number, the phone agent said they couldn't do it and I had to request this when I check in at the airport counter. At the airport counter, they tried to enter my Latam number, but the system said it was not a valid number...good going, Latam. LOL...I just smiled it off, that sounded about right, it's Latam. And this is in line with many other center/south American based companies-- anything out of their routine work is not doable.