Just one comment regarding the whole, "We've gotten so many complaints, we're not taking any more" thing ...
The OP was wanting Disney to take her name and complaint so that they would contact her and tell her what happened or give some sort of resolution. Based on what the CM said, she'd had many many complaints. So at the point the OP complained, it was highly unlikely that Disney was going to be able to get back to everyone who complained. This is likely what the CM was trying to say, but wasn't communicating well. Plus, once the complaint has been made -- unless you're planning on asking for money back or whatever -- Disney doesn't really make "informational calls" back. Can you imagine how many calls they'd be making per day if they did that for everyone who sent a letter or e-mail? It would be insane!
OP -- if you want Disney to specifically read
your complaints and respond directly to
you, then you need to take the advice of others and send them an e-mail or letter. Request a response, provide a valid daytime number, and then wait a reasonable amount of time. Remember that they get a lot of mail and e-mail every day, and are probably not going to call you back the next day for a generalized complaint about a party that they already know was an epic fail. But if you really want to talk to someone about your experience, write the letter or e-mail, ask for a response and be patient.
It will also help a great deal if you go back through your night and really think about what Disney truly did
wrong. Closing the candy lines at midnight for a party that ends at midnight isn't really something they did wrong, KWIM? Also think about the elements of the party you enjoyed -- fireworks, character greetings, parade, whatever. If you can balance out your complaints with a mention of something you enjoyed, it will help Disney see that you're not in it just to complain, complain, complain. You attended the entire party, you enjoyed several things, you had a lot of disappointments. A laundry list of things that went wrong will be kind of skimmed over. A few well-written lines of disappointments that you thought could have gone better will get you a lot more interest.
If you want compensation -- refund, whatever -- ask for it. Make your case and request your compensation. If you don't want anything other than Disney's time in looking over your concerns and a chance to speak to someone about it -- say that too. Disney can't read your mind. If there's a result you want, let them know.
Good luck!
