Start with the right control
Open Settings and Privacy, then choose the relevant privacy section. Profile visibility, who can start a conversation and the audience of a Status are separate choices. Review each setting that matters instead of assuming one switch makes all activity private.
The Blocked Accounts screen lists accounts you have blocked and offers an unblock action. Check the account name before changing the list. Wait for a successful result; if the action fails, keep the error and avoid assuming the block has changed.
Choose the audience before posting
Check the audience displayed in the composer before sharing personal details or media. Review Status and Stories for temporary updates, and private chats for conversations. Public posts can be copied or shared outside the app, so privacy changes cannot recall every copy someone already saved.
Profile-country visibility is separate from your language and region preference. Keep personal contact details out of public descriptions if you do not want strangers to see them. A blocked list and a muted notification are different tools; only use a mute action where the current screen actually offers it.
If unwanted contact continues
Use the reporting guide for a supported account or content target. Keep relevant links and describe the behaviour accurately. For a failed privacy change or a conversation that has no valid report action, use in-app support. Do not post private evidence in Community questions.