What can I do if chairman is harassing me in a company?

I joined PSA Co. on 1st Dec, 2022. On 11th September, 2023, the Chairman of the Co. Mis-behave by using filthy language, vulgar words, abusing words without any such reasons, therefore on , 15th Sept, 23, I wrote one more Resignation Letter to HR and handover it in person to HR with immediate effect but he didn't acknowledge it. After around 15 day, i try to follow up with HR and Directors of Co. but neither they reply to my Emails or Messages. Further, I was Appointed as Manager - Accounts & Finance for PSA Co. but the management of the Co. has forced me to work for other two Pvt. Ltd. Further, The Chairman of the Co. is regularly asking me to Submitted forged Purchase order to Citibank & Standard chartered bank in order to avail Packing Credit illegally. When i Denied for it, he started sexual harassments by abusing, using vulgar & filthy language to me due to which had saggared huge mental torturer and agony