Head of the department refuses about depositing my Identity card.

I was a Process server in a sub-divisional court under a district court in West Bengal state. But due to my health problems I submitted my resignation letter and my Identity Card to the Nazir (Head of the Process server ) on 5 th April , 2021. Then both are forwarded to the district court by a messenger . Then after 1 month from district court I am asked to submit my Identity card and 1 month salary. I submitted 1 month salary but as I have already submitted my Identity card to Nazir ( Head of Process server) I couldn't submit my Identity card. Then I told them that I have already submitted it but they don't believe me . Then I tell to Nazir( Head of Process server) but he also refuses about submitting my Identity card . I did not take any receipt from Nazir , the witnesses are telling that they couldn't not remember about it. There was no CCTV camera. The district court is telling without submitting Identity card you would not get released. so , in this situation what can I do ???