Help stopping spam from contact form

I have 4 websites, all built and set up the same way, but for four different locations. They are all built in Wordpress using Elementor Pro and use the elementor form as a contact form on the websites. The forms come through fine, but I also get lots of junk messages that come through in chunks every day. I've tried implementing captcha but doesn't seem to make a difference. Need help from someone to hopefully log in to the sites and implement whatever changes so that I only get genuine contacts coming through.