Urban Company — Had a service to hang the Swing for my child

Please read below my complaint to Urban Company and to you also:

Today professional has arrived second time for the same work, during his first visit he has completed the work but on very next we faced issue with his work, again we requested UC to assign professional for the same work, today the same guy same and not agreeing on his mistakes after marathon arguments he admitted he has not completed the work properly due to lack of tools in his bag, today I warned him that this swing is for my child so do your work properly otherwise my daughter might get hurt, if you want to change anything you are free to do, but he said now don't worry today I'm having complete tool and I fixed it permanently.

But right now my daughter was swinging and suddenly he fall down and get hurted, she is having pain in his head as her head hits the ground. Now tell me whose fault is this ?

I'll raise this concern to consumer court also, I want to talk to that carpenter who has done this blunder.