Sony India — behavior of service center

I purchased a headset, but then it was not working because there was a problem in my phone headset jack. They said they are not going to take it back. They haven't even told earlier that there is no return policy. Just looting customers. Again they said they ll open the phone and identify the problem and let me know. They said come in 20 mins from 7:30pm. Neither they have told their shop timings. I went by 8 pm and the shop was closed and 2 boys were about to leave, they gave me the phone. I dont even know if this complaint will be taken seriously. By being a reputed brand, because of these nasty service centers guys, just dont like using the brand. The owner is a very very rude guy with only aim to earn money and no helping nature on humanitarian grounds.
The service center is in ttk road, chennai.