Complaint against employer

Dear Sir My sister has joined a company In Gurgaon as a software traniee with a one year bond against 1lakh rupees , from the date of joining , they also taken the original documents for verification ( we have a receiving also ) Now she wants to leave the job because the work environment is not good Late night stretch, the senior called him mandhbudhi. Now they are not agree to give original documents. Please sugeest Regards Ruchin