Please Fix it

I recently joined tracker and i was told that a fitment would take place on my car yesterday. Well first of all i was called to reschedule but the person was fitting it came 1:30 mins later than the scheduled time. I was also told it will take an hour and thirty minutes to fit but it only took 20mins. I don't know what the technician touched when fitting the tracking device but now my airbag light is constantly flashing. I called tracker and was told that if has nothing to do with the device i will be charged R550.. Well i then called the fitment center and now they want me to drive to a Nissan to reset my vehicle, and not even one that is in a convenient location for me. Either that or they send a driver to pick up my vehicle. I'm sorry but no one else drives my car .And i dont even know how long the reset will take. I may lose a day in the process due to ques and stuff. They will not pay for my gas to go there and above all the error was caused by their technician who didn't do a good job. I've been a client for two minutes... I mean really. And yesterday i was sent a username and password for the tracker but they are not working. Maybe its best i cancel. Worst service ever!