How many divorces have occurred, and are they two or three, with details for each case: the first by uttering the words "Go to your family, you are divorced" without intention, the second by a text message after the husband was subjected to witchcraft by her, the third by uttering the words "You are divorced" with intention, and the fourth by breaking an oath not to attend her mother's washing or burial?

Your statement "You are divorced" is an explicit declaration that effects divorce without the need for intention in the first and third instances. The written divorce in the second instance is an implicit declaration (kinayah), and divorce is effected by it if you intended to effect it. Swearing by divorce in the fourth instance falls under the ruling of a conditional divorce. If the wife performs the action sworn upon, divorce occurs according to the majority of scholars. Based on this, three divorces have occurred, and the wife is irrevocably divorced (baynunah kubra). She is not lawful for you until she marries another husband, as per the Almighty's saying: "And if he has divorced her [for the third time], then she is not lawful to him afterward until she marries another husband."