Free wallet is a scam. They did the same thing to me about two years ago. Used it when I first started eth mining. mined about 2 eth when it was transferred out of my account to a user that had 10's of thousand of deposits coming in all from freewallets address. Tried the support ticket they told me the same BS i must have gotten a virus on my computer and some one stole my account or some crap. As I told them Kinda funny how none of my other wallets are comprised, and still to this day haven't been computer is still just as clean as it was back then. They are a bunch of scammers steer clear of that wallet for sure. I am pretty sure I even posted about it. I did and here is it. https://bitcointalk.org/index.php?topic=1964190.msg30380854#msg30380854

Again steer clear of the scammers and their wallet!