Sony Ericsson / Xperia Ray St18i — phone is not repaired yet

Address:

Kerala

i have bought my sony ericson xperia ray 6 months ago and the phone's screen has complaints now like screen is flicking and have dots in it and i have given it for reparing at the sonyericson certified service center near christain college calicut on 25-may-2012 and the phone is not repaired yet. whenever iam asking they say silly excuses like the spare is not available etc,i expect a replacement of the phone or extenstion of warentey since i dont trust sonyericson any more and not expecting this kind of smartphone (which is getting complaint in just 6months)from sonyericson.the phone cost nearly Rs 18,000 and the imei number of the phone is [protected],and the phone is registerd under the name ribin n at the service center and the phone number given is [protected] . i expect a quck solution for it