I just upgrade from free to silver and the discount was not apply

Hi,

Quick question, I just upgrade from free to silver and the discount was not apply. It says 50% off on anual plans, why i dont receive the discount 

Best Regards 

As far as I can see the yearly discount was applied, here is the invoice:

https://www.jotform.com/invoice?u=haciendadelsol&id=2016-12-01_14:56:05