Widget not showing

I’ve read your advice:

Why my like box is blank(I can’t see my Like Box)

1) You didn’t type the Facebook Page ID correctly – Type in Paga Id field your Facebook like box page url(without https://www.facebook.com/, if your Facebook page url is https://www.facebook.com/uefacom then type here just uefacom).

2) Your Facebook fan page doesn’t allow unsigned user see your Facebook fan page, so you must change it to public access. Take a look how change your Facebook page to public access here – https://www.facebook.com/help/community/question/?id=10151458855783663.

3) Clear your website cache(If you use cache plugin, then just clear the cache from your plugin).

This is how:

1) I’ve entered the Page ID ‘ampelivilla’ but although I have the title, the Facebook Like Box widget isn’t showing in my side bar. My Facebook business page is https://www.facebook.com/ampelivilla.

2) I don’t know whether my FB page doesn’t allow unsigned users and how to change to public access as the FB link quoted in the advice above no longer works. As far as I can see all my settings are public and unrestricted.

3) I don’t know how to clear my website cache.

The page I need help with: [log in to see the link]