Stay the hell away from this site.
I spend over 200 spins on Lucky Coin and noticed that it barely gave shit.
Every time it was close to giving a decent win or bonus/free spins it just passed by.
They have something called provably fair
You'll have to try harder to prove your accusation. Show us solid evidence.
Unfortunately I didnt see any of this until after their shitty support said this and I looked to report their site on several places.
You have to be careful not to smear the company name without evidence