I need to renew my icloud storage a payment was declined

Reasons your payment card may be declined

1.            Account suspended for suspected fraud.

2.            Address in your iTunes account does not match exactly the billing address for the card

3.            Error in credit card number

4.            Insufficient balance or you still owe money on a subscription

5.            The card was not issued in the country of the iTunes store

6.            Wrong expiration date

7.            Wrong security (CVV) code

8.            You are connected through a VPN provider that makes iTunes think you live elsewhere - uninstall VPN

9.            You live  in India

About billing for Apple subscriptions and media products in India – Apple Support (UK)

10.        You live in Russian Federation or use Russian banks or cards

Here is additional information from Apple if your payment method is declined.

If your payment method is declined in the App Store or iTunes Store - Apple Support