In Siddha Yoga, get this mantra with an entire betel nut and preserve it in front and chant ten rounds of the mantra. ॥ॐ नमो महाशाबरी शक्ति मम अरिष्टं निवारय मम कार्य सिद्धं कुरु कुरु स्वाहाः॥ I've some major reference to some genuinely powerful tantrik in Kolkata or black magic https://maps.app.goo.gl/7R8QDfUdiadsP3BH7