[Resolved]  Samsung Mobile Phone — Mobile is in service center

Sir,
i had submitted my cell phone at mDR services India Pvt Ltd (UG 30, Suneja Tower District Center, Janak Puri, New Delhi - 110058, INDIA----Tel no .[protected]).on the 12 th of july 2009 th problem was Hangging, keys not working on the phone.The target delivery was 27th july.When i went to collect the phone, i was informed that your set is Ok now.But, when i checked out the phone is not working and i was facing the same problem.So next day, i revisited the samsung service center on 28th july and again i had submitted my mobile phone in samsung service center.This time target delivery date is 12th August.But, now i am trying to communicate with them and they are not giving any positive response to me.As, no date 19th August my mobile phone is in samsung service center.My cell phone is only 1 month old.Model No.Samsung SGH-M620.Kindly do the needful.