Trolley not allowed out of the shop

I went to dischem Mams Mall as usual to buy things. To my surprise after buying lot of things that I could not carry on my hand and my car was parked far far away from the shop, the security lady told me that I cannot go out with dischem trolley. I ask the reason. They just told me that it's their rules. So how I am I gonna carry what I have bought. They told me that I must make a plan. So with dischem Mams mall you buy plastic bags even though you dont want to buy them. You buy only products that you can carry cause you are not allowed to go out with the trolley. This is pathetic. I dont want anything from them I just want them to change their rules to accommodate their customers.