Keep sending survey till user completes it

Hi all,

I’m using an event tracking to trigger a survey from code:

window.Intercom('trackEvent', 'open-survey')

I have set up the survey to trigger on this event, and it works fine.

What I want to do is to keep sending the survey till they actually complete it.

I have to collect responses and I’d like to force them to actually respond (not only dismissing the survey but completing it). 

How could I achieve that? Is there anything I’m misunderstanding here?

Thanks in advance