Bad service

I received very poor service from the Centurion mall parking management. I put my parking ticket in the machine and also put R50 into the machine, there was no activity what so ever, the machine had taken all my money and still demanded that I pay for the parking. I then called using the help button, and I was told that they are sending someone to assist. I waited for 10minutes and still no assistance, called again and was told the same story, "we will send someone" after waiting for 30minutes to be assisted, I decided to leave without being assisted, parking ticket was still not paid and no change received from the R50 note that I fed the machine. I am completely disappointed in the service received from the Centurion Mall parking management.