19 year old made manger, daddy owner

They have this new thing at spar where they check your receipts. My 10 year old son walked infront of me and got pulled back by the security. I told him if he ever touch my son again I'll sirt him out. It was assumed that I wanna get physical. The guy next to him now also got involved, and guess what? He was the supervisor. Instead of restraining him, he encouraged him. He then swore at me and I resorted to calling the manager and so daddy's little girl arrived. She was obnoxcious and by no means capable of sorting the problem. After realising I'm fighting a loosing battle, she told me I can do what I want, I can't tiuch them. Swearing was denied and well supported by our supervisor. If it is not constant meat that's off,then it's this. Im sick of their pathetic customer service.