Full and Final Settlement

I resigned with complete one month notice from 1st of Oct'16-31st Oct'16 and it was all approved by my manager but still I am facing difficulties in clearing my full and final settlement along with my Oct month complete salary and Diwali bonus.For this settlement in hold case when I contacted on my own in trail mail to my manager in Dec'16 after waiting for 2 months from resignation date I found that they had hold the salary and all other full and final settlement perks because as per them I had copied( which i have not copied) the data on which access is of everyone in the team and on which i worked for complete one year and two months and I earned the knowledge by working on it and made several standards of improvement and cleared out various loopholes in the process of it. During the period of working i worked upon data and provided monetary benefits to the company as well.So, my point of writing this mail is to ask from the Company that if this was the reason then company should inform me immediately ,but manager and HR team were silent until I raised the query. Please help me out.