Liquor Control Board of Ontario [LCBO] review: discrimination based on assumption, aggressive employee

We were purchasing a bottle of wine and some beers as we usually do every Sunday. Since I'm 29 years old I never had to present my ID, because it's evident that I'm a grown up person, however this time (May 17th, 2015) I was asked by the cashier to present my ID that I didn't carry with me. This woman immediately took the bottle away like I was about to steal them and kept repeating over and l over again that I'm under age and that she can't sell me alcohol in an extremely aggressive way. That was evidently ridiculous to me, I'm 29!. Anyhow, my partner offered to purchase it for himself with his ID. But no! She refused to accept it and in fact implied that he was trying to buy alcohol for a minor. Obviously, I went mad and tried to talk to the manager. First, he reminded us Canadian policy on alcoholic beverages (we are well aware of it) then advised us to come back 15 mn later and try to buy the bottles again (confused and unprofessional situation). We declined it of course and left without any bottles, but with a strong feeling of being bullied and humiliated by that rude cashier for no evident reason.