One air india staff misbehaved with me today whil...

One air india staff misbehaved with me today while i was drinking water from the tap when i was about to catch my vistara flight from ccu to del at 1710hour flight no. UK778 .this incident happend at around 1530hours on 11th may 2019 near air india domestic boarding section in terminal 2. Kindly see the photograph of the tap . During drinking suddenly i heard a voice ..hello hello hello..and suddenly one air india ground staff start shouting. Surprisingly when i saw his face he was a little angry and asking me to use a glass. I told him that this drinking water arrangement is mend to drink directly. But he keep shouting on me and told me that cant i see that glasses are there i suppose to use them to drink. When i asked him that this arrangement is mend to drink directly he was not even listening me . "Tumko paani nahi peena aata tumne saara paano jhutha kar diya.glass rakha hai dikhai nahi deta tumko. " for one second i felt like he is my teacher who himself doesnt know how to use these taps . When i told him sir main bhi sarkari mulazim hu mujhe tahjeeb hai paani peene ki " toh this fellow replied me "mere ghar main bhi sab sarkari mulazim hai mujhe mat sikhao jaada " this guy wasnt even understanding my point.suddenly another staff came onto the scene and asked this make to keep quiet . When i asked him that please show me your id card and id number he turned his id card upright down. And warn me not to touchhis id card. I can recognise his face very well. But such a horrible experience i faced today with air india. India air india people should train their employee in a good manner at least they should know how to use a potable water tap.when i was about to go for the complaint another guy who was with him told me that he will tell him not to repeat it again with any staff. So i felt like to post it here atleast people should be aware about these staff. I came inside for boarding and feeling like to complaint about this guy but i dont have any of his information.