[Resolved]  Hero Motocorp — Hero MotoCorp give old battery in new vehicle

I purchased a new hero destini 125 on 11/10/2019 and on the document its mentions 18 months of warranty for the battery but Hero service canter denied it and said my vehicle had an old battery as the dealer sold me old stock so the warranty of the battery is expired. It's having an Exide battery and Exide battery told me that they also can't help me. They all are blaming each other and no one is giving me any solution. As a customer, I want to know where is my fault and who is responsible for my battery which I don't have a bill for as it came with the vehicle. And if I want to go with a legal way whom to file the case Hero MotoCorp or Exide or the Dealer where I purchanged it, Please Help