The companies that honor their quoted price do so, at least in part, to keep their good name. They want your repeat business and they want you to spread the word that they are a good company. Disney may not feel this is necessary in these situations because they have built a very large empire already, and so the money they would lose by honoring misquotes may be more than if they lose one customer's repeat business. And I'm probably correct in assuming that you yourself is still going to go to Disney.
The person that mentioned 'consideration' in an earlier post is correct. Although you may feel you made an oral contract, it doesn't appear that you actually did as you gave no consideration in the exchange. On top of this point, Disney seems to have countless protections that give them the right to change prices even after you've paid!
Sorry, although many companies would give you something for free in such a situation, Disney just isn't one of them. Honestly, that sort of practice would probably just raise prices for the rest of us.
The person that mentioned 'consideration' in an earlier post is correct. Although you may feel you made an oral contract, it doesn't appear that you actually did as you gave no consideration in the exchange. On top of this point, Disney seems to have countless protections that give them the right to change prices even after you've paid!
Sorry, although many companies would give you something for free in such a situation, Disney just isn't one of them. Honestly, that sort of practice would probably just raise prices for the rest of us.

) so i called and told them the error and the price changed and i said that is not what was quoted and they basically said oh well this is the price and i said well how can a 3yo become an infant in a year he said there is nothing i can do by then he kept putting me on hold and after 45 minutes i was glad to get off the phone so it does happen unfortunatly 
. I was quite annoyed...We were never trying to get one over on Disney, we're happy to pay for our son and were told it included him when we booked the pkg. My husband was put on hold many times, spoke to managers etc.. to no avail. it happens, We're over it, we're happy to be going to WDW
. ( it's just the priciple of it all). Honestly, I think they have been training new CS people lately. When we planned our trip for last Dec, it was my kids 1st time so everytime I called, I chose the first timer option on the automated system and was patched into wonderful CS people who knew EVERYTHING. Sorry I had to vent as well 