All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
First of all, please accept our condolences on the death of your son and may Allaah make him precede you to the Basin (of the Prophet on the Day of Judgment).
Sometimes calamities could bring about good things, so you should not consider the loss of your son as a misfortune; rather, it might be the contrary. Did you not read the saying of Allaah (which means): {And as for the boy, his parents were believers, and we feared that he would overburden them by transgression and disbelief. So we intended that their Lord should substitute for them one better than him in purity and nearer to mercy.} [Quran 18:80-81]
Therefore, you should submit yourselves to the Decree of Allaah and be patient. For more benefit on the excellence of patience when being afflicted, please refer to Fatwa 83577.
As regards uttering divorce thrice in one session, then divorce takes place as three divorces according to the view of the majority of the jurists unless the husband intended to confirm the first divorce by uttering the second and third divorces, in which case, it is only one divorce that takes place. Besides, some scholars are of the view that it takes place as one divorce in any case. For more benefit, please refer to Fatwa 94110.
On the other hand, anger and magic do not prevent divorce from taking place unless the person is unconscious about what he is saying. For more benefit, please refer to Fataawa 85637 and 83467. Hence, we advise you to take your case to one of the Islamic Centres in your country.
Furthermore, you should not hasten to consider that it is magic that caused what happened to you and it is not permissible to accuse a particular person of having done magic to you. However, if you predominantly think that you are affected by magic, you may perform Ruqyah; in this regard, please refer to Fataawa 88705 and 85500.
If it is possible for a Muslim to perform Ruqyah for himself, then this is better, and if he is in need of some righteous people to perform Ruqyah for him, then this is permissible provided the Islamic conditions are met, especially in regard to a non-Mahram man performing Ruqyah for a woman, as she should wear Hijab in front of him, not be in seclusion with him and so forth.
Allaah Knows best.