Maruti Suzuki India — Replaced my original car battery without my concern

Address:

Maruti Suzuki Service, Hengrabari,Mahapurush Madhabdev Path, Milan Nagar, Borbari, Guwahati, Assam 781036

Today ie 18/10/2020 I went to repair my baleno car steering issue bearing no. AS-01-DA-0374 at Maruti Service Centre, Poddar Car World, Borbari, Guwahati under guidance of staff Sri Kaushik Mahanta. On delivery after work is completed in the evening he informed me that my battery have to be replace so when I checked it I found my battery might have been changed with someones old worn out battery without my concern. So I complaint to General Manager Sri Rituporno Sharma on the spot and he said my existing placed battery is the original one as number written in my manual book..So at his word I took for granted and still have doubt..So at their presence I took pictures of the placed battery in my car and my manual books number. So its my prayer dat I just need clarification that all work done is genuine.