Check the payment details, expiry date, billing address and available funds. Read any message from the store or your bank, including requests to approve the payment.
A bank may decline a transaction because of a restriction on online or recurring payments. If the details are correct, contact the bank or payment provider for the reason; the app may not receive the full explanation.
You can also try another payment method offered at checkout. Never send a full card number, security code or banking password to Chatbot support.