I had 2 overcharged transactions this month, 1 with Manny's they overcharged me $10 on a meal and one with the hotel, charged my CC even though we had prepaid in UK. Rang PO CC and they said I had to get in touch with the companies myself, they will only get involved as a last resort, 1st time this has ever happened to me so wasn't sure if that was normal or not.
Got in touch with Manny replied within minutes appologizing about the error. I sent him link to my mini review of the meal and he has said the next meal is on him if I get chance to call in August. Hotel have eventually said sorry and 2 days ago said they have refunded the money, just checked now, still not showing online.
With Disney as you say email is not the best option with them, I would ring them or try your CC and see what they say.