Q by Tonique - Tonique sold a leaking bottle

I purchased a whisky bottle from Q by tonique in kompally branch. Later when I am heading back home, I noticed the bottle is leakeing from cap, when I went back to complain and request for a good bottle, they started claiming I have tampered the bottle and it's my mistake who did not do a thorough check in the store itself. Staff was really rude and they're not ready to accept theier fault. This is really bad to know from such well-known company. I kept the bottle and bill is same shape and I need prope apologies from them.