Spice — My Handset Not Repair By service center

Address:

Varanasi, Uttar Pradesh

Sir,
I bought a new spice mi350n Handset on 17/05/2012,which IMEI no. was [protected].
After some days using, handset starts hanging.
and after that its totally Dead.
Then I submit my handset in spice service center Varanasi.
After more then 2 month, they swap my handset with a old handset as like they put that handset from dustbin.
and handset has been dead in service center.
and after 10 minute from delivering I re submit handset.
then after more then 2 month they swap that handset with a very bad looking handset.
after using few month their are a lot of no of problem comes in handset.
so I resubmit my handset in service center.
after near about 2 month of submitting they say my handset has been completely repaired.
when I reached for deliver my handset front camera doesn't works. when I say they fix it.
but the network problem is same.
and when I complain they suggested me to using Vodafone and show me by their own Sim card but
its not works properly for Internet using.
And when I say Vodafone is not in my beget, they says deliver the handset and throw it into dustbin.
then I not deliver my handset and come to my home.
please help me please..
my email id [protected]@gmail.com
& my mobile no- [protected]