If you choose to invest money into a game thats your decision, the game doesn't owe you anything, you are not being forced. If you continue to keep spending money even after you keep moaning then thats even worse.
If you feel like you've been scammed out of your money then hire a lawyer, I heard ahnald is looking for work (joking ahnald love u)
but seriously there are more important things in life that constantly moaning about someone cheating in a mobile game that you can literally play for free. if you're that upset about it then just cut your losses and delete the game from your life and you'll feel much better mentally