Installer threatening to remove my dish!!!

Game had a special for the DStv with free installation which I had purchased to replace my old rusted dish and to have on hand for when I wished to reinstate my subscription. I had no problems with using the voucher and receiving free installation but now the installer is threatening to come to my property and remove my dish because according to him Multichoice will not pay him because I have not activated as yet. <br> <br> Nowhere did it state that I am obligated to activate my subscription within a specific period inorder to qualify for the free installation, nor was the purchase contingent on me doing so. How then does your installers have the right to threaten your customers and what do we as customers have to do with the agreement between Multichoice and their installers? If this installer dares follow through with his threat to tresspass and remove my property, then I promise to not only have him arrested but to take him but Multichoice to court.