Panasonic — Unethical service

Address: Kolkata, West Bengal, 700052

Website: www.mobile.panasonic.com

On date 29/10/2016, an Android Mobile Phone Panasonic A2 Eluga was bought by me IMEI- [protected] from M/s S.H. Mumtazuddin Times (P) Ltd. Kolkata-01.
Problem aroused in my Phone after using it for six months (approx during March last week) when the battery of my Phone was not working properly.
I brought my phone to the service centre of Panasonic where it was told to me that the Battery Warranty is over, which is not mentioned in my reciept or bill. In my bill one year warranty over the phone is been mentioned. When I mentioned the same to the representative he denied by saying that Warranty is just over the Phone (not Battery).
Please look onto the matter sir.