D-Mart / Avenue Supermarts — limited quantity allowed to purchase why is this not mentioned on counters of various product

Address:

400078

On dated 12/05/2018 i visited demart store at kanjurmarg, i bought 25 ltrs gowardhan milk, 10 bottles of thumsup and other household goods at billing counter i was told that they will not allow me to take 25 litres of gowardhan milk and 10 bottles of thumpsup, i asked them reason for it they said me that other customers should also get i told them that you should place on counter that limited no quantities is allowed. After wasting so much time at billing counter u are saying this i ask them under which consumer act this rule is being practice they did not reply