By calling or writing to Disney and explaining what happened and the credit card you used, plus nthe number off the back of 1 of the tickets, they will be able to fix everything for you. Don't worry.
I also agree with the poster that mentioned making your house look lived in.
Leave a television on. -This is perfectly safe and will not cause a fire. I have had a Television in the bedroom that has been on for 3 years before. If anything, the picture looks sharper!
Leave the bathroom light in the Master Bathroom on while you are gone. A theif will wonder if someone may be sick and up in the middle of the night.
Leave a pot with a lid on it on the stove. Put a stir spoon next to it on the counter. (The stove is OFF!!! but from a window it will look you will be right back)
Leave a radio or TV on in the kitchen
Park one of your cars in the driveway so that it is at an angle and you will be having to move it soon. (saw this tip on Oprah, a former cop was on and said that crooks always look at how cars are parked and if it is at an angle you are probably home)
Leave a coat or jacket in full view of a windo on a couch or chair so it will cause someone to wonder if you are home.
Placing a hat on the back of a chair or couch in the living room and turning on a light, will look like someone is sitting that chair during the evening hours.
(A dummy would be even better-but unless you are Michael Jackson, you probably dont have one of these!)
Leave a pair of boots or shoes on the porch
Ask a neighbor to put one of their garbage cans in front of your house while you are gone (on garbage day only of course!)
Since you will be gone at Christmas time, put your tree lights on a timer. Nothing like a dark tree to let someone figure out you are on vacation.