Deleted form still shows up in Google search with information

Deleted form still shows up in Google search with information that I need to no longer be available on the web. How can I get rid of that? The website is no longer up, the forms are deleted, but the info and phone number still show up on the web. Any ideas?

Unfortunately, there is nothing we can do on our end to prevent Google from displaying cached results.  The only way for the form to fall off their results is to wait until the URL is no longer being cached on their end.