Nokia Mobile X2 - 01 — not returned repaired handset

Address:

Malappuram, Kerala

i had given my nokia handset model no. x2-01
for repairs to the authorised nokia centre located at tirur -kerala.
on 25th july2011. they collect my phone
and promised me they will return that within 30days. But still not returned the handset..
i made many calls to the service center,
and i asked several times for their head office telephone number
they are not providing that. what will i do now..
i need that within 3days..so plz help me