Paypal - cancel payment

Paypal - cancel payment

Hi -
I have a form linked to paypal and everything works if you go through with the paypal process.  But if you submit the form, and at the paypal screen change your mind and cancel - I get a "Payment has been cancelled" in a little zoho status window, and then at the main creator.zoho.com page - it doesn't go back to my site.  Any ideas how to handle cancelled payments?  This is not a subscription - just cancelling a one-time payment before it's submitted.

Thanks,