Eluru Dealer Rude and irresponsible Response to Replace the Battery which is in warrenty

I have a battery with DIN60LH Model of 30-months warranty which was bought on 19/06/2019. I have a warranty card with proper details available. The battery was dead yesterday while speaking to dealer in Eluru( Andhra Pradesh) he stated that is not the model for my car(how can a car owner knows about the suitable model? where the same old battery was sold by Amco dealer to me) and there is no stock available for replacement as of now and it will take a lot of time to get replaced. if this is the situation how can customers trust your Amco brand.
what should i do with a battery. there is no proper response or solving the customer problems. hope my concern will be solved at the earliest.

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