Understand how to control your Apple Ads campaign spending with daily budget, and how to make budget adjustments for ads on the App Store.

https://ads.apple.com/app-store/help/bids-and-budget/0016-manage-budgets

Retail Store or contact the Apple Contact Center on 000800 040 1966 to request a refund or credit of the difference between the price you were charged and t...

https://www.apple.com/legal/sales-support/sales-policies/retail_in.html