No full and Final settlement

I resigned ftom my organisation in August 23 around 21st and served 3 months notice period . Post that till date my fnf has not been done. I was aware that organisation takes 90 days min. And I followed for the same . Pls note my 2 months salary was stopped though in written I begged to stop one months salary , I understand last months salary is given on fnf but no revert despite 3 people in mail. They once called me and started accusing me of data transferring , and how i can compensate for pending work ( hiring and setting new team and industry vertical), which never was mentioned during three months notice period, whatever majorly data related was asked for i duly completed it. also they began countering that I had to gjve back or accommodate them for one time retention bonus paid in sep'22. Incidently this was proposed by them without any strings attached. But the new consultant who replaced the earlier director along with the then hr consultant had been looped in and they well know this fact. I have the documents. I recieved a mail today after again following with them that 2 months salary plus leave encashment plus Gratuity minus one time retention bonus is what is remaining. I served this organisation from 3rd April 2012 till August 2023. The organistion is is run by 2 twin sisters and now they have sent this and discussed through the daughter who happens to be lawyer and sent the mail through her. They Also tried to pin hiring of people on me and there payouts to be met (variable pay ) I am suffering on the account of this impartial behaviuour and this is putting lot of pressure on me. I am unable to concentrate. Can I expect justice. I have tried being patient for 8 months and believed having given 12 years in second stint to this organisation and our team which ever I took up has been performing yearly and consistently , woth rewards showered,(I fear they may even now picture it differently) never once believed that such would be the results. In my first stint I was relieved in the best possible way abd i cherish it. I rejoined them since they approached me I did not ask neither I begged. It was mutual understanding. They were also understanding and gave support during tough time when my father was on death bed for 3 months. But since this so called consultant/CEO has come on board he is trying every thing which I believe is counter productive. Though he claims to have worked as CEO but I have my doubts, which he hardly justufies by these tactics . I have worked under and know who actually are what u call CEO. rational.persons with rational thinking. Help is needed for a common man . The organisation is Delhi based. I need genuine advise and a way to earn what is due to me.