Dear Sudarshan,
If You are jobless first thing you do is check whether you have sade sati. Post your birth details in the vadic astrology forum There are qualified astrologers there to help you (Expecially Deepa bhandari and USR) The strategy will depends on the diagosis.

General solution for getting a job is worship of karthikeya or Buvaneswari. But do consult astrologers first.

With regards to black magic - the general solution is fire worship . Check this in my posting under the head "Urgent help needed -Matter of life and death". (But I am not a practicing tantric . My knowlegde is book knowledge) I suggest consult Bhairo. (You will find his posting in this forum). He will give you specific advice for whichcraft. His deity, Kal bhaiorav is very powerful. Request Bhairo to help you.

I dont know any practicing tantric in Bangalore.
Regards,
K.Ravindran