Nope. You'll have to start over.
My friend formatted my HDD (wbfs partition) when he plugged it into his PC.
I've used some recovery files software but they didn't help.
Is there any way to get the files back? At least games' names
WBFS is a proprietary format so it's not surprising that you couldn't recover it. I would suggest you set it up FAT32 the next time around. That way if it happens again you have some recovery options.