The three most common reasons your payment from Nigeria may be giving you this message are as follows: processing error, cardholder error, and bank error.
To resolve the issue, please review the information you entered to ensure it is correct. You may then retry your payment. If you continue to receive an error message, then the error may stem from your bank. Please reach out to your bank for assistance.
You may also have certain transaction limits that may need to be approved by your bank. The limits are Card Payments (NGN 1 million) and Bank Transfer (NGN 5 million) and USSD (NGN 200,000).