Requirements of SERVICE ,REALIVING LETTER,PF for last month, variable pay amount for last 9 months which company is not giving

I have worked for tyres ltd company for more than 6 years, for 5th year I have not received my annual hike due to that I have raise my concern to higher management however company management said to me due to 3rd year and 4th year my performance was average due to that I have to give my resignation or company will terminate me ( This was oral statement of company). I replied in email my current year performance is best ( which is true because I am in sales and for last 9th months which I have worked for that target no. only achieved by me in my team ) in my team however company send termination letter to me and taken forced sign to me. Company has given me 3 months salary as well f&f for my gratuity, leave payment and last month salary to me. I request company to share my SERVICE LETTER ,REALIVING LETTER and variable pay amount for last year of 9 months which company is not giving also my last working month PF amount which has deducted by company are not be added in PF amount no. Please suggest legal advice for forced termination as well my requirements of SERVICE LETTER ,REALIVING LETTER and variable pay amount for last year of 9 months which company is not giving also my last working month PF amount which has deducted by company are not be added in PF amount no.