Micromax — Service center closed, not giving back my phone

Address:

Lucknow, Uttar Pradesh, 226006

I bought a Canvas Doodle 3, from store after some months there was a problem that the phone was needed to rebooted after every 5 minutes because every app unfortunately stopped. I submitted the phone in the service center (Aminabad, Lucknow) they said that there was a problem with motherboard so it was to be replaced but now that service center is closed and a new is opened in Sri Ram Tower, Hazratganj ; they are not telling about phone and are only delaying about that topic by saying that the phone is not in our records and will call me after they check it again but they don't callback. I don't even know that if my phone is repaired or not.
Please help me with this .
Phone: Micromax Canvas Doodle 3
Colour : White
Name: Ishan Gupta
P