The Mobile Store — They don't give my mobile back

Address:

Gautam Buddh Nagar, Uttar Pradesh

i m deposit my mobile at mobile store noida sector-18
HTC DESIRE V because it is having problem in display, and i have an extented warrany of mobile store ...and no one is telling me that when my mobile got repaired and come back, , ,
your technician AVDESH, store manager Aamir and Head of store Salesh these three are not recieving my call also, , soo tell me what to doo nowww...

also i m comlaint to them many time but they not responding to my single complaint
complaint no--MSCO10033699

Name - Navdeep singh
IMEI no- [protected]
Extended w no- EW[protected]