Maruti Suzuki India — service complaint

Address: 641105

We have let our vehicle for service on 25/01/2020 at abt maruti service, sundarapuram, coimbatore. On that day we got the information from the service engineer that our vehicle fuel filter assembly has fault and no other issues. Then we took delivery of the vehicle and run the vehicle as per instruction of the service people. Today 30/01/2020 we again went for service as per the instructions of the service people. But today we have received the instructions from them that our vehicle fuel filter assembly is good only the battery is fault and has to be replaced. How the fuel filter assembly fault will become good and battery will get repaired in this short time of both the service dates? If there is a fault in battery how the vehicle will start and run up to the service centre and now also the vehicle is self starting and running? Kindly clarify the above statements clearly. I want the clarification from the maruti service engineer for legal purposes in the consumer court.