lack of responsibility and acountability

this is realy shocking i installed the tracker device in my car teh past three years i then called last month to check if the devices is working or not i almost have heart attack to hear that the device is not working i even got the e-mail to say the decice is not working and i need to forward them my details again so they send teh technician to repair or instal the new one but i wil have to pay r395.00 for technician But they were deducting on the account all along why should it be my problem for their product ,why did they not pick it up that teh device is not working, why they continued to deduct money on my account while teh device is not working what annoys me teh most is that they say the cannot see or retrive when did teh device not working and tehy cannot refund me what a poor peroduct ,services,poor responsibilty and lack of accountability is this a **** or ***** pleae WATCH OUT or you might as well fall into the trap . they even want to rob me by saying the will give me the new contrack for 3 year they think i stupid or what. but my lawyers has to intervene for this