Sc st case

Iam Harshavardhan from anantapur district 23 age I studied my graduation at vizag One of my vizag college classmate girl friend She asked my 3lakhs financial help for her medical treatment .which she have to take treatment at hyd .she said she will return it in emi's For that i helped her..3lakhs amount....by bank transfer to her and her dad account. After two days SHE CAME TO MY FLAT AT VIZAG.on that day 1.8lakh and 80000 ruppess samsung mobile was missing in my flat. Next day i got information that she have that mobile which was i lost in my flat. After that i got information that...she dont have any medical problem..she taken money from me..for enjoyment with her 3frds..at hyd.... For that reason ..i asked money return from her ..she returned it for me 3lakhs.... She also accepted that she theft 1.8 money and mobile at my flat..... Shes already spend that 1.8 lakh money witn her frds at hyd...for that Shes requested me .not to tell anyone abt money and mobile which was she theft...she said shes already returned my 3lakhs amount....she dont have money now...she will return which was she theft as soon as possible.. she also said ..she will return money for that mobile also.... After two months i asked her money which was she theft and for mobile also ....she telling she dont have money. After a month i decided to tell that to her parents ..all these.. BUT Before that she went to police station she filed a case against mee...that She just taken only 3 lakh and mobile from mee..she return total amount ...after that also ..iam asking her physically .......iam blackmailing her. That i will send nude pics and videos of her to all....i absuced her related to her castee..she was a sc st girl. I never done lyk that ..but i dont know what to do...at police station they r not seeing any of my proofs..i have a proof that which was i gave to her....i have wtsapp msgs and vocie calls that...shes also accepted that she thefted money and mobile from my flat....... Can u please suggest how to proceed with these...