the following advice is not really for the OP
Ive seen people here discuss drinking wine touched from an OTD child and my Brother-in-law also disussed it regarding a “Rasha” child.
Ive also seen stories where OTD children were forced to eat from paper plates (as opposed to real Dishes)
(Both cases occured in the Frum parents house so Kashruth was not an issue)
This is terrible advice and behavior I have seen, Not only will you not bring back the person, you will make them even more angry.
Tough Love as some have suggested is not always the best medicine, It CAN and DOES backfire