Sony Ericsson — bad servicing

Address:

Maharashtra

I have given my Sony ericsson phone W595 to the service centre on 19th June 2010
The workorder no. is: SE310MT113309
Phone submitted to: Mobile Technology, 45/1785, Sanghmitra CHS, Opp. YMCA DN Nagar Link Road, Andheri(W), Mumbai - 400053, Ph:[protected]
with the complaint that the screen goes blank for hours together anytime on using the mobile phone. If we do not use it, it shows the display.
This problem persists since the phone was in guarantee period. And I gave it for sevice twice before during that time but the second time they returned me the phone saying that phone is working fine.
Now the phone is not in the guaranty period.

This I have given at the service centre. I want the phone to be repaired and I consider the repair should be free of cost for two reasons:
1. They returned the mobile to be unrepaired during the warranty period saying it is repaired and the problem still got worse.
2. Even this time if they say it is repaired, I cannot trust how long the phone is going to function well or will I need to get it repaired again.

Going to service centre again and again cost me both time and money, and yet i do not receive any proper service.
My handset is still with the service centre and they have refused to repair it till I pay 2500Rs to them.

I want my handset repaired free of cost since its not my mistake that they did not repair it during the warranty period.

I am ready to follow the consumer court process to get this done.
Please help/advice how can I do that.

Thanks,
Megha