Panasonic — service centre and battery of t40 mobile

Dear sir
I am having panasonic t40 mobile whose battery i purchased from panasonic service centre (Chandratri enterprises, kankali hospital commercial complex raipur c. G.) on 30th september 2017. The concerned service person mr. Rohit gave me an unpacked battery. I asked him whether it new or not? He told it is new. I took the battery and get sim tray repaired, as that was not reading one sim. After reaching home i observed that the was draining very fast. I informed him over phone. He told to bring it he will check. As i live in raigarh c. G., i told i will when i will come to raipur. Then i returned him the mobile with battery. He told he will check the problem and inform me when issue will be resolved. After that i came to raigarh. After that i called him after a week, he told he will change battery but it is not available now. After that whenever i called him he told battery has not come. Then he started telling model has stopped so battery is not coming. Then he started avoiding my phone call. I called 50-60 times but he didnot pick the phone. I told him return my phone and my money he told he will ask his senior. Till now he has not returned my mobile and the money. Please resolve my issue otherwise i will go to consumer court.
Thanks
Pankaj agrawal
Tamnar, raigarh c. G.