My experience was initially very good with the cartrack

My experience was initially very good with the cartrack. However they are not upfront with their deductible fees and periods as to when they will deduct I did discuss my debit order dates with them and agreed.. But there was no further communication on the other deductible fees and as to when they will go off. Now today I receive a call to say that my account is in arrears thus putting my name in bad light for their lack of information. I wanted to cancel with them. Now they are telling me about about cancelation fees...basically one must be trapped to be with the company. I want to know the fees that I need to pay to them so that I can cancel with them