It is very sad, And You are not alone in this mess. There are countless people who suffer due to one evil person in the family
Black magic is a reality. Very harsh and terrible reality
What Malik wrote is very accurate detail. And finding a right aalim is very difficult. As there will be so many people who will recommend you to this or that aalim. Most of these will be the ones who do black(or similar) magic themselves. So you must avoid these kind of people.
You need to find a pious person who can take you out of mess, not for any worldly desires but for Allah.
The Djin(good and bad), Spirits, omens all are present they don't do any harm, unless there is some evil person in family is destined him/herself for hellfire and tries to make yours a mess too.