Consumer Redressal

I have purchased Samsung S advance for Rs. 18190/-. After 5 months of purchase the same started making issues. The Network signal started to drop. Whenever I called someone, the same could not be done as the network goes off everytime. Even two to three times the network was off for complete one day. I called my service provider AIRTEL for such problem, then they told me that its your phone problem and not the network problem and insisted me to change my phone and try. I changed my phone, and then it was working fine. I had to face huge amount of my business loss, due to the same. I gave my phone 1st time to the service centre, then the executive told that they need to do software update, 2nd time they told that they would change network card, 3rd time they told that they had changed the motherboard. But still,I am facing this issue. This is not at all done. I dont have so much time that I would go to service centre and submit my phone for 15 days always. Kindly refund money.