If you're charged a little more than the listed price for a game or other content, it's possible that the difference is due to government and/or local taxes applied depending on your location.
Please also be sure to check if you were using a payment methods with additional payment processing fees. See the payment methods with additional payment processing fees here.
Except for these cases, if you notice an extra fee, or you received a refund for less than what you initially paid, please reach out to your bank or payment provider for details about any additional fees that may have been charged.