Facebook is dangerous

Be very careful on Facebook I don't know how they got my details Yesterday the 14th of July at 9:45 in the morning I just got debited out of my fnb account from Facebook I don't how they got hold of my card information there was a purchase on my debit card I had the card with me at home and I didn't even go out to the shop I was at home still. I had to cancel my card get a new card and I deactivated my Facebook account as well I am not using Facebook any more Face book is dangerous and after yesterday face book only gets one star