Rude security guard

Earlier today I visited a clicks in Cape Town at airport mall Belhar…I had a trolley full with groceries and the security guard lady at the door rudely told me that they don’t allow trolleys in and I should either leave the store or leave the trolley outside, funny enough there were trolleys inside the shop with peoples groceries. I then told her I can’t leave my trolley outside because it has my belongings and I do need to go inside Clicks, she told me that is not her problem, I should’ve started there before grocery shopping if I truly needed to go inside the store so I must do whatever I want but she won’t allow me inside