Phone recovered from bikers but police not releasing my phone. Remedy?

You can write a complaint to the S.H.O of the Police Station and to the Cyber Cell detailing about the stolen mobile phone and the dereliction of duty on the part of the Police Officials in not returning the recovered phone. You can also mention the harassment you are being subjected to by the Police. 

If no action is taken by the Authorities, thereafter you can approach the Delhi Police Complaints Authority and register your complaint with them. The Police Complaint Authority has been set up to deal with the complaints of public regarding acts of serious misconduct by the policemen / officers of Delhi Police. 

Kindly contact us for any further details and action.