Please wait until the charge clears into your account before taking action. Until it clears, it is still changeable.
For example, a while ago I was on a road trip in a new area, and I had filled up my car at a gas station. I checked my statement online a day or two later, and the charge from the gas station was over double what I had actually spent. (this was at the height of gas prices last year, too) I freaked, thinking someone had managed to fill their tank on my card, too.
Turns out that that particular gas station just puts a hold on a very large amount until the actual amount clears. When it did clear, the # went back down to what I paid.
Anyways, when I freaked, I called my CC, and they told me there were unable to do anything until the charge cleared, specifically because of the fact that holds can be placed on more than the charge.
So, wait until it clears, and then go raise hell. :)