Why did facebook lock my account? :(?

[Sugarcandy]

i really wanna go on it, and i dont want to make a new one, cuz i made like so many accounts before this one but i deleted them but i really wanted them back so i made a new account AGAIN , so i dont wanna make another new account and annoy my friends... its asking me to enter my phone number but i dont like entering personal info onto it... what should i dooo???! will it EVER get unlocked???? cuz i just said im not making a new one, ppl are eventually gonna get annoyed... why did it get locked anyways? it was totally fine yesterday, could it have anything to do with me changing my password???
i am old enough to have it k?