How and where I can file complaint against my employer?

Hi, I am currently working in one US based company as a HR Manager. at the time of joining the management asked me to sign 2 years bond without witnesses signatures and to submit my all original educational documents. but because of some caste discrimination i felt uncomfortable and i told the management that i want to leave while i was in my probation period. i told my management that i will leave by fulfilling the probationary norms like paying 1 month salary and giving back my id cards and all. at that point of time, my management apologized for discriminating and they promised me that it will not repeat again. but unfortunately since from last 1 month i am struggling here in terms of salary, work atmosphere also as i am avoided by the management in all possible concerns. I have decided to quit this job and i intimated the management that i want to leave and i need relieving. I got odd response from the management. they asked me to pay 1.5 lack as a bond breakage value or else they wont relieve me or they wont give my original educational documents to me. I am in hypothetical situation and i am thinking to end my life because i lost my certificates and now a days without certificates there is no life.I cannot sustain in the present day market. Please help me in getting my certificates back.