Bandelero

Can anyone give me information on the 3 hindu gods that go by the name of Sangani Dee, Veera Bhadra , and Kala bavira and why do we pray to them etc .

HI i recently attended a service at a shakti temple and was told by the deyota to give devotions for 7 weeks and do puja at the temple and at home for these 3 gods sangani dee, veera bhadra,kala bairava ; can anyone help me by telling me the nature and orgin of these GODS and what kind of puja this and why do people do devotions to them . thank you