I sent documents several times, there is no investigation, it's account where 1.7 BTC left in 2015 when it was around $300 and in 2017 they alow me withdraw 0.2 BTC (I withdrawal it to check if it would arrive) and after that they blocked the login and aks for all possible documents and when they realized that everything is correct they always send the same email that they will let me know when the investigation is end. They simply don't want to pay because they are scammers.