[Double Down]

I went through the same thing a couple days ago. Made a withdrawal then an hour later, wanted to reverse it. Tried to do this in the cashier section but could not use the "void" option. I emailed them, then the next day they emailed back saying that they knew that this option wasn't available from the players' end and apologized, saying that they plan to fix this soon. Then I was told that they reversed the withdrawal for me.

So it'll happen soon, don't worry. It may be as long as a day before they get back to you.

As a side note, judging by the tone of your post, you may not realize that Full Tilt is known for having terrible customer service, sometimes not responding to emails for DAYS, just so you know. You might not want to play there in the future if this is an issue for you (I know it is for many people, it's why they don't play there anymore)