Avoid unlicensed, unknown exchanges like these.
There is simply no reason to use them given that there are a variety of other exchanges that are way more trustworthy than this particular site that you can register with, that are also well known/regulated.
This site is pretty shady, in my books. The reviews essentially tell me the same story, as all I have seen have been accusations from people who got scammed. If you already sent the BTC first to them there is probably not that big of a chance you're going to get it back considering that their site seems to be exclusively set up for the sole purpose of luring victims for a simple scam.
Don't ever use exchanges that you haven't heard of before, without doing due diligence. Stick to exchanges that you know are trustworthy and have previous experience with (e.g. Binance, Shapeshift (though not that convenient anymore with the accounts), or even localbitcoins).