Bisleri — No Batch no/Mfd on/MRP on 5 liter jar cap

I have purchased 5 liter Bisleri mineral water jar from Hotel sanman Belgaum karnataka on[protected].It is stated on the jar sticker that "Best for consumption within 3 months from date of manufacture. For Batch No/Manf on/MRP see the Jar cap. But even after close observation I could not find the details on the cap. Now please tell me How I have to arrive at the expiry date, and who is to be held responsible for any untoward incidence. The jar is bottled in your Maski (Dist Raichur) plant.This is not expected from trusted company like Bisleri.Please investigate in to the matter and take necessary action. My email ID is nadgouda.[protected]@gmail.com and my cell No. is [protected]