Delete the App from your iPhone.

Delete your Facebook Account. It is only the top of the Iceberg. I think there is more to come. I changed my email address two months ago from my Facebook Account and now I get a lot of spam. I have the account since 7 years and never got so much spam. The make billions with our data. Stop that and delete your Account.

Captain Slow,Hamster,Clarkson about Facebook, v164.0