From their post on your page:

How to ban someone from facebook page on mobile. Here are the detailed steps with illustrated pictures. There are several ways to ban someone from your facebook page. Click people and other pages.

Ban people using “people and other pages”. The left pane in your browser is titled. Go to your page and tap posts then tap visitor posts.

Ban or block profiles from your facebook page. There are two steps to this and they are very simple. From their post on your page:

Go to the page in question. From their post on your page: Click ban from page and confirm.

A popup window should appear where you will see the people liked your. This feature isn't available on the facebook lite app, but it is available on these devices. Find the post of the target person and click the three dots next to it.

Access your facebook business page and click the “posts” button. There are 2 ways to ban someone from your page. I will show you how to ban someone from your fb business page.