Tracking unit not working

For about 8 months I have been testing the functionality of the tracking unit. At first I was told to wait for 3 days, but no luck. I Tried again , I received sms saying that the signal could not be picked up by the system.Every time when I tell them about the sms they tell me to test again.The premium increased but the device is not working.I sent an email because I was now tired of making calls. Vania forwarded the email to the testing department for them to contact me.Instead of phoning me ,Deeran Baboo (supervisor) rep**** to say I must request for a test. I did that for about 3 times with no luck until Amanda Linda informed me that they can't pick up the signal and she will arrange for a repair of the device.While waiting for the fitment centre to call me, I then received email from George saying I must request for the test. I spoke to Deeran a day after over the phone, he promised to follow <br> up.Even now no response no feed back but at the end of the month the debit order will go through for the unit that is not working. I am unhappy, angry and frustrated .Who can help me on this matter ?.