To make the most in the Durga Saptashati Vashikaran Mantra, you have to chant it with utmost devotion and faith. It is recommended to chant the mantra in a very silent and peaceful place, preferably before a picture or idol of Goddess Durga. There are plenty of main reasons https://www.youtube.com/watch?v=sM2pPGc3tMA&t=6s