Samsung — Poor quality/faulty mobile handset

I procured a Samsung Galaxy mobile hand set on 30.10.12. The hand set did not function properly so sent the hand set to Samsung authorized service centre 2 times i.e. on 22.1.13 and 18.2.13 and accordingly files an complain on company’s web site. But the said hand set did not repaired properly and said problem persist continuously and I am missing lots of important call because of faulty instrument supplied by Samsung India and local mobile dealer. I once again approached company but the issue remains unresolved. Now I am requesting you raise the issue with Samsung India Ltd and do needful from your side so I can get my money refund as I am no more interesting to get any instrument from Samsung.