This covers what happens if you try to purchase a premium membership on your credit card and it's getting declined.
If your credit card has funds and it is still getting declined the main reason is your credit card company is blocking the charge.
In order to prevent this - contact your credit card company and ask them to allow the charges.
After that, you should be able to purchase the membership if all your information is entered properly.
If that does not work, you can try to pay with your credit card through your PayPal account.
If you have any further questions, submit a support ticket and we will respond in 1-2 business days.