Dues not being cleared

I was terminated from the company on November 17th 2016 via an email dated December 7th, 2016. Here the reason cited was "because of your deliberate deliver of poor quality jobs directly to the client." The quality mentioned, however, was not checked by the US client who are solely responsible for checking the files. Furthermore, those files were done by me on November 19th and the mail suggests that I was terminated on November 17th, 2016. So how could I be responsible for doing those jobs. The mail states Your employment with MBS India is terminated because of your deliberate deliver of poor quality jobs directly to the client, effective from 17th November,2016. "You have been engaged as QA and your quality directly affects to the client which you are well conversant with as a senior member of transcription industry. Still you were engaged to do that vandalism. Now, this issue has been taken under their control by Audit department and they are going to audit your last three month jobs. Till the completion of the audit, your all dues will be on hold. My question is how could they term the quality delivered was deliberate. What vandalism have I done? Where is the audit department of the company? Nobody is deputed senior to me in my department and my files are to be checked directly by the US clients for whom we serve. The company has been receiving uninterrupted payment from the US client and on what basis they are holding my payment which includes November salary and an 11-month due Leave Encashment. Also to mention that the company is issuing salary slip showing PF deduction but for the last six months PF has not been deposited. Please guide me about the points so that I can mention those in my mail. Thank you in advance. Sincerely, Anannya Chatterjee