Dangers of bad association

Due to bad association, the living entity desires material happiness, liberation or merging into the impersonal aspect of the Lord, or he engages in mystic yoga for material power. If such a person actually becomes intelligent, he takes to Krishna consciousness by engaging himself in intense devotional service to Lord Sri Krishna.

Chitanya Charithaamrutha,
Madhya Leela, Chapter-22, Text-35

Black Magic Remedies

• 
• Give some money (any amount)to the person who is performing black magic on you. If the person does not accept the money, drop a coin in his/her pocket, etc. Doing this will break the spell.
• Put separate lockets of durga/kalimaa and hanumanji
• Read hanuman chalisa/bajrang baan daily
• keep a photo of hanumanji and light dhoop sticks on it