No trolleys? No sales from me!

I had a rare morning out at the mall with my daughter who was feeling a little under the weather as the morning progressed. She was sitting in the front of the trolley, well-behaved and quiet. Upon entering the store I was approached by a security guard and told trolleys weren't allowed in the store. I am baffled. You have a kids section. There was a sale on. I was GUARANTEED to spend SOME money there. A trolley keeps kids out of trouble on the floor. I won't ever shop at Zara again - this is just ridiculous.