TRACKER MUST BE S****PED !!! - Paying bills for a unit that is not working

My unit didn't work from May 2015 until March 2018 when they replaced it. But I keep on paying my bills. I tried to contact Tracker to test my unit without any success. There was either no answer or I have been cut off. When realizing my unit did not work , I tried to claim back my bills I paid over that period when the unit didn't work. I have started with this process beginning of March 2018. Up to now , I received very poor responses via email and via phone calls. Till to date 25th July 2018 I haven't received proper feedback from Tracker. But in the meantime I must keep up-to-date with my payments otherwise I will be reported to the credit bureaus. Like all the other complains here on Hello Peter - poor or no service , treat customer unfair , *****ing my money. Tracker should be s****ped as a service provider. They shouldn't even get a 1 star rating. It should be a HUGE NEGATIVE RATING.