Contact them?
Most likely they will not do anything about it even if they would like to help, people this influencial have let's say some "contract with the devil" and I consider this medical system the main tool of "the devil" and they are not allowed to talk against it.
Have you ever seen anybody highly influencial talking anti-vaccine? With the exception of people who have been banned from multiple social media platforms and demonized in MSM.
There is an old video of Tom Cruise saying psychiatry is pseudoscience and of course he would like to talk about it all the time but he was told to shut up.
Elon Musk wanted to buy Twitter to make it a free speech platform but he was only allowed to do after promising not to do that. Not only he wore a Satanism costume on Halloween but also wrote on Twitter that he is located in Hell (this was after Halloween ended). Remember how he was talking against psych meds? I promise he will not talk like that ever again.
Forced psychiatry was used on these singers as a punishment for violations of their contracts, among other punishments used on people for such things.