Blocking Unknown callers
from another forum I found I could block Unknown and Unknown Caller, I added these as contacts and edited the contact and blocked both, now going back to the contact details the contact is unblocked, I choose block this caller , when I go back to this contact it's unblocked and the option to block the caller is there again, no matter what I do it still goes back to unblocked. searching the forum I found nothing, is blocking unknown not allowed?
how can I fix this
IPHONE SE (2020) IOS 15.5
iPhone SE, iOS 15