I want to upgrade the account to Silver but it is not working

Hola 

Quiero reactivar la cuenta en el plan Plata y no me lo permite. 

Agradezco su apoyo para solucionarlo 

There is a problem with your card, and I suggest checking that with your bank. It says Incomplete payment to our end, which means your card has no enough balance for the upgrade. 

I tried initiating the upgrade for you, and it is the same thing. You may want to change the card as well.

https://www.jotform.com/help/330-How-to-Change-Billing-Credit-Card