My daughter and three of her teammates went to Disney World and Animal Kingdom last summer a couple of days after they finished up their volleyball tournament in Orlando. I had bought tickets online, and they had fast passes for a couple of pre-defined rides at pre-defined times. Their first use went perfectly, but the second time they tried to redeem their passes it didn’t work correctly. One of the park employees let them on the ride via the Fast Pass line anyway, but told them to go to Guest Services to have it checked out so they wouldn’t have more problems on the next ride.
At Guest Services, the employee there wasn’t sure what the deal was, so he basically just asked them what rides they were still interested in riding, and issued them new unlimited fast passes for those rides. Then he noticed one of the girls was sitting down, nursing a sore ankle she’d tweaked during the volleyball tournament, and he asked about it. When the girls told him she had hurt her ankle playing volleyball, he whipped up a wheelchair and some lanyards, and the girls got to skip lines the whole rest of the time at both parks. They had a complete blast, and referred to themselves as “Tessa (the injured girl) and her Entourage” the entire rest of the trip.
Basically, if you have any sort of problem at Disney, and you’re honest and sincere about it, the staff will bend over backwards to make sure you feel taken care of. They have pretty much the best customer services of any entertainment venue on the planet.