[Resolved]  Sony Ericsson, Mobile K - 530i — Problem in Display

I have purchased Sony Ericsson Mobile K-530i on 28.10.08. On 1.10.09, I hv display problem and I submitted the phone with their Service Center in Rohini (Near M2K) vide WO/SE309RDC10977 dated 6.10.09. Today is 9.11.09, I have not received my Mobile back and nor any satisfactory reply from thier Service Centre. I have made several calls on [protected], every time they are giving same reply, "we have sent your mobile to chennai and you will get call back from our office within 24 hrs. but reget, one month has passed, I have not received any reply from them. Pls. advise