Rather than sending people to your contact page though, I’d send them to a page that does a better job of introducing yourself. They are only one click away from your contact page (or at least they should be!) and in the meantime you are better off introducing them to your brand via your homepage (or your blog/about us/services page...) then sending them to a contact us page that puts all of the onus on them.
Once the call-to-action is setup, it is extremely easy to edit. If you are an admin and you go to the page, you will see the call-to-action button. Click on it, and rather than it taking you somewhere, it will offer you this dropdown menu:
Just as important, to the (even remotely) trained eye, not having it will stand out as a red flag (why isn’t this brand page using all of the resources at their disposal?).
Click “Contact Us” (or whichever option you selected) and Facebook will offer up some very basic analytics.