The purchases you make are mediated by the app stores, and we unfortunately do not have any access to your billing information! Only Apple or Google, depending on the device you have, are responsible for charges and refunds! 

Payment methods accepted are also defined by the app stores, and may depend on your country or region. iTunes and Google Play store define policies for these transactions and payment methods accepted.

Please contact Apple or Google support to verify which payment methods can be used for your specific region! :)

You can find a quick link to Apple support here, and for Google support, here.