Worst possible service

Firstly i would like to say that i am not impressed with the lack of service that this tracking company has provided me with.it seems that all people want these days is sales. After sales service is beyond shocking as i bought this tracking unit around about 4 months ago. I went to go have it installed at a Tracetec approved installation centre in Randburg named Auto alpina.Upon arrival on August the 7th i had to wait an hour before leaving and coming back later as the only person who had to seem to know about my installation was out doing personal errands.Later on i returned to find the gentleman who was now supposed to install my unit when i was asked if i knew where the tracking unit would be installed on my vehicle.i then called my mechanic and asked him where they installed it which was not difficult to locate so i installed it which was no problem to the gentleman at the installation centre. from date of purchase and installation,exactly a month later i received a call from a lady from Tracetec to ask me when i would be taking my vehicle to have my unit installed which i then explained to them that it was already installed and i named the dealership and gave my invoice number to her which i was told not to worry she was on top of it. I recently have sold that vehicle and have bought another vehicle . I called Tracetec to notify them of change of ownership and they have no knowledge at that point to my vehicle or the unit that was installed so now they are telling me my unit has lost my three year warranty and want to re charge me now for my unit and want to come to me to install! I don't believe that i should have to charge as this is surely break of contract as if my bike was ****** or hi Jacked,I would not of have been covered and i can only imagine how that would my insurance .