Missing electronics and damage to property

I booked a carpet cleaning service a week ago with Unique Clean who operate out of Centurion. My Samsung tablet went missing after the cleaning staff of Unique Clean had been to my house. Furthermore the cleaning staff of Unique Clean damaged the wall and frames of my bedroom doors with their equipment. When I complained about the missing tablet and the damage I was told that they would follow procedure to speak to their employees and would arrange with their HR company to have polygraph testing done. After a few days of me following up with the owners of Unique Clean I was then told by the owner that they would not be taking any responsibility for the damage to our walls and doors and that if we wanted to have their cleaning staff go through polygraph testing that I would have to pay for all the costs. I find their response shocking and unacceptable with a real lack of customer service!