It is not understood that what made you to give her money every time she demanded or requested.That too sparing such a huge money without any evidence or proper documents leads to lot of suspicions about your narration itself. Your narrations are not believable.
However since you have sought legal solutions for this,
you may lodge a complaint against these people with the police, do not worry about her links with any politician. The proof is your bank transfer records as well as her written assurance for repayment.
You may file a civil suit for recovery of money on the basis of the bank transfer records and the written acknowledgment given by her.
The curt fee and the lawyers feecan be known from the lawyer whom you may engage for the purpose.