Supabets are *********

I am so unhappy with this platform words cant describe it firstly, i played a bet with their bonus of which i won but there after they told me no i can not withdraw because of some percentage rule and they took all my winnings, the ********ity of it all is that their rules on bonuses a just jiberish you cant make sense of and second what happened to my winnings so basically i placed a bet for them. But thats all good its their money i played with yesterday i placed bets with my own money i cant see a single bet on open or closed bets its as if i never made a single bet a search for even past bets cant be seen. Where can i report this because they took the bets but now they've disappeared.