Bad Technician Work and Service

I have purchased a vehicle from Kia Silverlakes Agreement Id:***3 with a tracker device installed on 5 March 2016. A few days after I was contacted by Kia Silverlakes informing me that the wrong tracker device was installed in my vehicle & that a technician will come to remove & install a new tracker device in my vehicle. On 10 March 2016, a technician named Adriaan with technician code: EF038 came to install en remove such device from my vehicle.Upon the installation the technician when I asked if there would be a new tracker device installed & would be working and active he hesitated & seemed unsure himself. I repeated the question & he just agreed with me.On 24 March 2016,almost two weeks later Kia phoned again & indicated that the device was not working & was faulty. I indicated that I was extremely frustrated in the service I am receiving & that immediately action must be taken as my vehicle is at risk without the device & should it be ****** the vehicle could not be traced as the technician did not do his job correctly. I have till date not received any communication from Tracker to resolve this matter & found it to be very unprofessional to say the least.