Exactly the same issue with parental controls not working. We have been connected to full fibre for some weeks now and when set up originally worked briefly and ineffective since. Can a moderator please make contact to resolve.
Welcome to the BT Community and thank you for posting!
I am sorry for the problems you're having with Parental Controls. I have sent you a private message with instructions on how you can send us over your details and we'll look into this for you. See: Private messages