Is there a way to revert back to the old reCaptcha?

Our current site’s forms are working just fine with the old reCaptcha field. We have a new site now and are using the updated invisible reCaptcha. However we are experiencing large amounts of spam being sent in through the forms on the site. A valid email address is sent in, however for the “Name” field, a long strand of numbers is placed there. We’ve experienced this numerous times in the past couple days and are wondering if there’s a way to revert our forms back to the old version of reCaptcha since we’re not experiencing spamming issues with that.