If you wish to buy credits, please follow these instructions:
When you are on Talkatone, tap on the settings menu, tap on Credits option, and tap on Buy Now link. Continue to the add payment method and complete your purchase.
Please note that all payments are handled by iTunes/GooglePlay Store directly; we don’t have access to credit cards or payment information.
If you are experiencing problems with your iTunes/GooglePlay account, please contact AppStore Support team so they can give you instructions on how to fix those problems.