No feedback-Handed over to debt collectors?

I installed tracker in Aug 2011 as my ins company listed it as a condition for cover. A contract of +- 10 pages was verbally discussed with me telephonically & recorded.The salesperson was not very audible & I just wanted to get this interview over and get my car insured as my ins. company assured me that the premium for tracker was incl. in my ins. premium . However, in March 2014 (32 mth into the 36 mth contract) I changed insurance and did not require Tracker anymore and tried to cancel the service.The d/o still continued & I would return them unpaid. On 01 August 2014 when the Tracker contract had actually expired, I was still receiving outst. bills & contract was renewed without consent? I was told to pay a R 800 cancellation fee?. Also,I was told I wasn't covered by Tracker from March upto Aug because the acc was not paid but they still want backdated payments from March for a service that was not in effect due to non-payment? I was not covered but I have to pay for a suspended service now? I have mb's of emails with Tracker and Zodwa and this person just did't respond until today - after 5 months with another outstanding bill? Then I receive a call from Debt collectors too?!