Tradus — Defective Mobile provide me, Order id: 9714090_01

Address:	Gurgaon, Haryana
Website:	Tradus.com

i am purchuse mobile from tradus.com on 28th june 2013
i received the product on1st july in morning and,
i switch on the mobile, mobile is hang continuous then i go to service center and they update software and return me, thereafter same problem come again problem not solve, service center executive told me, "we accept your mobile and provide you DOA certificate and you sent the DOA certificate in Tradus.com and they give you new mobile or money refund but you mail to tradus.com and confirm let me know before 1 week"
then i sent to mail to tradus.com regarding this problem but they reply computer generete mail mention in we response 24-48 hrs
so tell me what i do, this mobile not working properly, this mobile continuously hang totally stop not working, if this is work very slow then i handle but this is totally stopped, the solution is remove battery and connect then this is start, from 1st july i remove the battery more than 1000 times
so please what i do, return my money or replace any other mobile
please revert me on priority
mobile model is : Karbonn Smart A12, cost: 5902/-
Order id: 9714090_01