[Resolved]  IBM Daksh Bangalore — Bad management

I gave my first resignation on 2nd of jan .I received no reply from their side.Even after giving resignation i received 3 months salary which is was an approx 45k .Suddenly in march company manager realizes that i am not coming to office and calls me .when i tell him about my resignation .he says please send it again .
so i sent resignation second time on 23rd march .as i was not working i got the salary, they are asking me to pay back now that to full amount of Rs45000 which is impossble for a student who is carrying everything by her own .
And they are threatening me to spoil my career to my parents.
I have absolutely no idea what to do .please suggest me what shall i do ?