Broken speaker

The installer appointed by OnAir TV came to my house on Thursday 16 April 2015.<br> Both the technician (Pieter Steenkamp) and his assistant seemed friendly and competent.<br> I left them to carry on with the installation and while they were busy I heard a crashing sound.<br> Not wanting to appear rude I left it for a while and checked in a few minutes later.<br> Everything seemed to be in order. When I checked a little later, I noticed that my sub-woofer speaker <br> was broken. When I asked the assistant he denied any knowledge.<br> When I looked for the installer he had taken my cordless phone without my permission and was making <br> the call for the connection of the new decoder. I found this most unprofessional as he is being paid to <br> do the job and should use his own phone. Not wanting to cause a scene I did not say anything.<br> When he completed the call I asked him about the speaker and he also denied any knowledge. When I said that I had heard a noise he claimed that one of the small speakers had fallen off the counter, not the big one.<br> I am very unhappy as this is a new speaker system that I had installed recently and now it is a case of my word against the two of them!!!