How long will facebook take to reactivate my account ?

I was trying to chang my e mail id for facebook account but later i changed my mind and clicked on link that i have not send the e mail change request on d link send by fb on my e mail, now they have temporarily suspended my account, i have loaded a copy of valid ID of mine as prescribed by them in 1st stage, it has gone 7- 8 hours but no response from fb,, how long will it take ?