SONY India - Sony Xperia X10: Low Quality product and more poor Customer Service

I have purchased Sony Xperia X10 few month back. I have noticed a problem in hand set after few days as it gets off itself if the internet was connected. I have consulted the Customer Service at Aundh, Pune for the problem and here is the story afterwards.
After upgrading the phone 2 times the engineer still didn't understood the problem with the phone and he asked me to take it back as he was not ready to submit for repair. After having a heated argument, he inform that I have to go to main service center to submit it. Once the phone was submitted and after lots of argument they agreed that there is some build in defect in the phone. Since then I am following about the phone and received no response about the real cause and what they have done to repair it.
On top of that on a argument over the phone Customer Service executive hung up the phone in between with all the rudeness in talking.

My question to Sony is that the way you put the money in the advertisement, please put some money in hiring the literate Customer Executives and making reliable goods or else don't expect Consumer to go and buy your products. I'll make sure from my end that I can put my words over to as many people as possible about the kind of product you make and the way your people behave so that people are aware about the real face of this company and products.

BTW
My Work Order SE311APN10174
Complain No 89682746