This exact same thing has happened to me.
000webhost is brilliant, until they suspect you've done something illegal/against the TOS, then they just delete your website without warning.
I had to wrestle with 3 different support people before trying to prove that i had done nothing wrong. They finally believed me, then said "Sorry we've deleted your website, you can just reupload it."
Hah, what a joke, even when i tried to reupload my site i had more problems, i could login but not upload anything, kep getting restricted access errors. Just gave up and moved to Byethost.com, have had no problems since then,
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