We're sorry to hear that, to prevent this from happening in the future be sure to set password prompt to appear before any purchase is made.
To make this possible, do the following:

On Android

  1. Open Google Play and tap on the Menu Button at the top left.
  2. Press Settings at the bottom and then under User Controls select Require Authentication for Purchase.
  3. Select For all Purchases through Google Play on this device.

On iOS:

  1. Quit the game and go to your iOS settings menu.
  2. Choose iTunes & App Store, then Password Settings. ⚠️ Beware that this option only available if you're not using Touch ID to confirm your purchases.
  3. Tap Always Require line, after confirming this option with your password all further purchases will require the entry of the password to be confirmed.

On Windows:

Windows 10

  1. In the the Microsoft Store app, select in the upper right corner of your screen, and then choose Settings.

  2. Under Purchase sign-in, turn off I want to buy without a password, for faster checkout.

  3. Repeat these steps for each device you share.

Windows 11

To require a password for purchases, using a PC or mobile device that has Windows 11:

  1. Open Microsoft Store and select Profile next to the search box.

  2. Turn off Purchase sign-in.

  3. Repeat these steps for each device you share.

Huawei App Gallery

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You can add a security question to authorise purchases.

Log in to your HUAWEI ID. Go to Settings - Account center - Payment and purchases - Settings - Security question. Enter the password of your Huawei ID and then set your security question.