Here I wrote detailed info about all their actions https://zen.yandex.ru/media/id/5f4c9387bb042e41cdd642d9/rasskazyvaiu-kak-igor-hmel-i-dmitrii-dolgov-ukrali-bolee-70-millionov-dollarov-na-svoei-kripto-piramide-bankex-5fc69a4eb693be65e8c3681d

you can translate from Russian also there some links how they cheat and steal money