How do I get a refund for unintended purchases?

My younger sibling plays this game on my phone and he spent money purchasing various items in the game accidentally.

Is there a way I can get a refund on these purchases? Thanks for any help.

Hey there! Apologies for the delay in response.
For refunds, you will want to submit a ticket to the support team of the platform in which the purchases were made on.

Google, Apple, or Steam Support teams should be able to look into your request for you.