Unfortunately, we cannot directly change your payment information for you since Toomics does not store the credit card data. :(
However, if you want to change the credit card in order to constantly renew your VIP Membership, then we recommend you to cancel your VIP Membership first and then wait till your subscription expires. After it expires, you can purchase it again with your new credit card.
If you want us to cancel your subscription, please contact us and let us know your Toomics account credentials.