Trisha Enterprises (Spice Service Center) / Spice Mobile M-4242 — my mobile not return by spice service or service center

Address:

Bhopal, Madhya Pradesh

i purchased a spice mobile on 15/02/2011. it was working properly for 2 months after that it stoped working properly. then i went to TRISHA ENTERPRISES (spice service center) and they told me that they will return the set in two days but when i went after two days they again said they will return the set next two days. and the same story went on for two months. After that they returned the mobile.
After 10 days mobile again stopped working and again i went to service center (TRISHA ENTERPRISES) and the old story again continued. after two & half months they returned my mobile and my IMEI no. changed i first time.
It worked for only three days properly and previous story again repeat with me. after three month they return my mobile. and IMEI no. again changed. this mobile worked for seven days only. the previous story again repeat with me. In last time, i submitted my mobile on 08/11/2011. and they have not returned my mobile yet. during this period i have been very distracted. and i have spent so much money on going to service center again and again. I have told them many times to return the mobile but they do not listen to me. please help me getting my mobile back to me.
DETAILS OF MOBILE:

customer name- RAHUL SAHU
current add. - 103, rachna nagar, BHOPAL
ASC NAME-TRISHA ENTERPRISES
LOCATION -BHOPAL
price of mobile-1250/-
MODEL NO.:- Spice-M4242
IMEI NO. of new mobile-[protected]
IMEI NO. (changed in first time):-SMP[protected]
IMEI NO. (changed in second time):-[protected]