managing forms with expiration dates

how can I make the form not accessible without deleting the form?

I have sent out the link and it has an expiration date, so I want to make it inaccessible after the expiration date, which is a few days before the event.

Thanks for your help!

P.S. I didn't get a live chat "Jotform" person when I logged in today.  Is there a way to access your service from somewhere? The option didn't come up in "Support" tab.

I see you have already set the expiration date for your form. Here is related help article for more information: How-to-Limit-Submissions-in-a-Form

With that setting enabled, the form will show a warning message and will not load form fields. Please note that expiration date and time will be applied based on date/time of user's device.

Do you have any other question regarding disabling forms? 

By the way, live chat option is only enabled if our support forum and email inbox are manageable. Currently, there's no fixed schedule for the chat to be available. 

We will be glad to assist if you need more help, just let us know.