Hi, marcti! I think you're referring to the Starter Pack, right? Could you tell me what version of the game you're currently on?
I'm unsure where you're trying to buy the Starter Pack from but if you're eligible, it will appear in the store. Know that the Starter Pack can only be purchased once.
- Store > Treasure
- Add Crowns Button
- Tap the Treasure Chest that appears on the right hand side of the screen, under Medals