How to get back my all original certificates from College management?

Dear Sir/Madam, kindly help me to get back my all original certificates from College management, i had submitted my all education certificates and experience certificates during my join. but they refusing to return my all original certificates. Director asked me to work for 1year or pay 3months salary to college. i was joined in the month of April 2023 and August 2023, i had given my resignation letter with 1month notice period via HOD email but college director was refused and even refused to get resignation letter from me during that time asking 3month salary or must 1year. due to person reason(Wife's delivery) decided to resign my job from college. my last working day was 7 sep 2023 and i had informed my dept HOD and informed Director also. after that i left the college without my certificates. now am blind bz dont know what to do now. only one action was taken that is i have sent my resignation letter via register post 12th feb 2024 but no response from college. please any one can guide me how to procced hereafter.