Advice needed

Hey, i used Webflow to buiod my website, there is a contact us part on it wich uses capcha for security, the form then use google appscript to send a wellcome email.

Im beeing spamm bombed by these bots, any other way to make this stop than dosabling the contact submit button?

The issue is that its rolljng since 2 days and my normal sent emails goes into people's spam folder.

Thanks for the advice