How should one deal with paternal uncles who have performed sorcery to cause separation and binding, and is it permissible to boycott them?

Maintaining kinship ties is obligatory, and an uncle is among the relatives with whom these ties must be maintained. It is not permissible to harbor ill suspicions about an uncle or accuse him of sorcery unless there is absolute certainty. In such a case, he must be advised and warned. Kinship ties are not to be severed, even if the treatment is bad, because Allah has commanded us to repel evil with good, and patience in the face of harm from relatives makes Allah a helper to the pious. If you fear problems from relatives, it is sufficient to contact them by phone and inquire about them, as maintaining kinship ties has degrees, and the lowest degree is to cease abandonment and offer greetings.