You may not have a leg to stand on.
Is the guidance councillor employed by PTC? If not, PTC will be able to say that they are not responsible for what he said and it was a television interview, not an advert for PTC.
Similarly with the silly student. PTC can say that he was spouting off on his own.
Unless PTC actually paid for this interview to go out it is not "advertising" - it is just the personal opinions of two delusional people.