If you're unable to create a payment method, make sure the payment details entered match what your bank has on record. Incorrect information could include:
Payment Address (Most common)
Name on Card
Check your payment details for typos, ensuring you have the correct information in each field such as the expiration date and CVV. If that doesn’t resolve your issue please contact your card issuing bank directly and verify you’re entering your payment method information exactly as is recorded with your bank.