I have found that if you call up an airline, hotel, etc. and wind up with some non-cooperative person with attitude, who will not cooperate,
the thing to do is simply hang up and call again or call later.

Last year LH would not put me and my wife in adjacent seats after, for unknown reasons we were not seated together. Just hung up called again and got seated together with no problem.
Called a hotel to confirm and found that they put me in a handicap room for a nine day stay. Asked to be changed out and they said they could only "maybe try" that once I arrived next week. Again, called the next day (to make sure I wouldn't come across the same desk agent) and they changed me to a regular room with no problem.