Mental harassment by the employer

Hello all, I worked in a company for 2 years. 3 months ago I submitted my resignation, but hadn't accepted it. I had a meeting with him about the same but without listening me properly he forced me to work there. But as per appointment letter either party can terminate the contract without any reason by providing 3 months or 90 days prior notice. On my last day, I had a meeting with him and told him that I will not work from tomorrow but still he forced me to work in his office by telling that you have to continue for 1more year or more than that. Next day I didn't went to the office back and he started threatening me that legal actions against you would be taken because you ran away. After that I mailed him and reminded him about my resignation. I also asked for original mark sheets and relieving letter, payslip. But he told me that he will not provide me those things, rather I should come and rejoin immediately . He blamed me that I have not submitted the company tools and tour bills and ran away. I told clearly that I have submitted everything and I have photo with me as proof of submission. Then he told they didn't receive those things. They told me if I join any other company they will give negative feedback to the next employer against me. And he will not provide payslip and relieving letter. After 2 days I have given a reminder mail to him but he replied that tour bills are not settled. I know I have submitted my bills but still I asked him which bills are not cleared, kindly forward me those things so that if any bills are pending then I will transfer the amount online. But after that he didn't replied to me. What should I do to get my original mark sheets and relieving letter along with the payslip? Kindly help me.....