Sponser demanding money

Hi
I have been working in a beauty salon in sharjah. I worked there for five months and was having some problems with my boss. In this situation my mom fell ill and I had to go to India and later decided not return to the UAE for the time being. I called my sponser and informed her that I want to cancel my visa and labour card(I never got to see it when it was issued). She informed me that she will do it. I have a new job offer in sharjah and I cannot process my visa since the old visa was not cancelled. I called my old sponser and explained the situation and asked her to cancel my visa. She said that I will have to pay for it and she is demanding ten thousand dirhams. I cannot pay that amount and she is blackmailing me saying that I should transfer the amount first thru western union and then she will cancel it. Since I am not living in the uae I cannot go to the labour ministry to lodge a complaint. I tried the embassay in delhi but they say they cannot help me. What should I do? Has anybody faced this situation.

RS