Why don't I have access to family sharing

Are you using the same Apple ID that you used to set up family sharing when this happens?

If necessary, contact Apple ID Support.

Apple ID Support

Apple ID Support (2) 

Apple Support by e-mail or chat    Work through the screens to get a chat option. 

Apple Support using Twitter

Or fill out and submit this form.          The form is for iTunes, but it will get passed to the ID Support section.  

What happens when you try? Error message(s)? You can't access it in Settings/Your Name/iCloud?