Sony Ericsson — Not working after one and a half month of purchase

I had purchase Sony Ericsson phone model no. W5801 dated July 4, 2008 from Orange Tele Services, Lajpat Nagar II, New Delhi 24. After one month it started giving me problem - low battery back up, buttons not working properly, not able to receive calls and text messsage not appearing properly on the screen. When i went to the shop from where i bought it the person was extremely rude he told me to go to the service station directly and get the phone repaired. When i asked him to give me a second hand phone as my work is phone based he refused to give me. Secondly when i went to the authorised services centre "Technocare, E - 17, Lajpat Nagar II, after much fighting they gave me the nos. of the manager Mr. Anubhav who didnt took my call and then i had to lodge the complaint at the cust0mer services. If this is the type of service Sony Ericsson provides i will tell people not to buy that phone. I am still awaiting a reply from there side.