Nokia x2
Complaint about Nokia X2

Sir/Mam

I bought this phone on 5 Dec (Nokia X2), after some days the display of the phone was not working properly and mobile hang ragularly, I have complanit twice near Nokia care, tilak nagar, new delhi, but the problem was not solved yet. Why they do so??? I have suffered a lot without my phone and i have take leave for so many days..please take some neccessory action