Bad service holding me hostage

Last year August I took out a car tracking service with Tracetec, in September I was called by one of their consultants claiming that I am in arrears and they never received their payment. I then went to my bank to check if the debit orders were successful, and it showed they were.<br> Recently I contact them this ongoing issue of \arrears\" on my account, and said I would like to cancel their services. I was then informed that in order for me to cancel I would need to pay them a cancellation fee of R1300 as I am locked into a 36 month contract. They never informed me that i will be entering 3 year contract or the cancellation fee when I signed up for their service.<br> <br> Please I need help with this as I feel they are holding me hostage in their bad service.<br> "