Coin Master complaint: Over charged

I am being charged more then what I had purchased. And double charged days later after the purchase was made. I never spend more the 15 $ and never more then once every couple of weeks . I am finding charges for $50 ….. that I had never done. As soon as I make a purchase the amount shows up on my bank statement . I am out of at least $70 that I didn’t not purchase . I contacted apple to get the refund explains to them what happened. They processed the refund and because it was so much money they told me I needed to contact the app coin master itself . So I put a complaint in explained everything in email and also attached screenshots of the “purchases “ with proof of all That was going on. Their telling me their is nothing they can do about it…? So now $70 dollars I was charged and got nothing out of the game. My money was stolen all for making purchases for a stupid addicting game . Something need to be done about this because even apple said I’m am NOT THE FIRST PERSON. To explain all of this.