Owner swearing at 12 year old boy

Took my son to Kart Kings indoor Karting for a morning of Go Karting, it was for his birthday.<br> He bumped into the sides a few times, and the young man working there had to help him get the cart going again.<br> After they finished their rides, my son got off the track in tears, telling me the young man swore at him, telling him that if he does not stay on the F..ing track, he will throw him out.<br> I was very upset, and sent a facebook message to them when we got home. Got a reply saying the \young man"is the owner and he will never use bad language.<br> Tried to reply to the message "