The Rahu mahadasha and shani antardasha will finish in March 2017. If you have proof and leagl documents then you can take the legal help. File a case of 420 as per IPC. Take help of police in putting pressure on her to pay back.
Unfortunately our system is such that cases go on for years and therefore there is no rules of Law. That we why we are Sham democracy. We people misuse the freedom given in law.
I do wish that you get your money back, it may not be easy as indicated earlier. But I believe that if you follow the legal course, you can put pressure and recover your money.