Where to update credit card number on which I am being billed?

A while ago I made a update to my account to reflect a change in credit cards for monthly payments.  I no longer have Amex.  I can't find where on my account screen it took, (VISA) should be my payment card. 

I'm also getting monthly (seems like) emails that I'm upgrade to premium or an update is done.  I hope my account has not been compromised.  I should be paying $9.99 a month for your services.

Please contact me 804-400-5473, I've tried to reach out to you.

Thank you.  

Hello Sandee,

I did check your account and found that you have premium monthly subscription and you are paying $9.95 per month. 

It seems you were earlier being billed on Amex credit card ending with ****3009 and successfully updated credit card number ****6803. Is this the card on which you want to be billed right?

You may like to take a look at the following guide on how to update your payment method:  https://www.jotform.com/help/330-How-to-Update-My-Subscription-s-Payment-Method 

Hope this helps.

Do get back to us if you have any questions.

Thank you!