My survey is getting tons of responses but no one should have access…why?

My survey is getting tons of responses but no one should have access…why?

Did my survey get a bot attack as soon as I put it on? I have like 200 responses.

Where are all these coming from?

Can I someone talk to me and find a way to fix this?

Do I need a capcha thing on zoho surveys?

I need help ASAP. 

This is so disappointing!!

thanks,
Mitchell