Full n Final Settlement issur

I was working with a pvt ltd company in Pune, when i resigned i had mentioned clearly in my resignation mail that i am ready to serve the notice period of 60 days as per company policy. My manager accepted my resignation and replied me on my mail that sge will release me within 45 days. Now the scenario is i had discussion with my manager about my early release because i was ready to serve complete notice, and she confirmed me that there won't be any deductions from my final settlement as i am getting early release due to efficiency. When i got my Final settlement 17 days salary got deducted by the company against my early release. I did alot of follow up with Company HR and My manager, theyare noy replying on this issue. Kindly advise me what to do, i am a middle class man and i was completely dependent on my final settlement money yo start something new.