Poor service

Ive been a customer with tracker for the past 10 years , I received a call from a tracker sales consultant advising me that my current units "retrieve" on the 2 cars I have under contract with them have reached the end of life and I need to upgrade to a "recover" unit on both cars , the Very very first thing I inquired was will this affect my repayments terms and the answer I received no and that it would actually decrease , I then agreed and we processed to conclude a deal for the two cars ..1-2 weeks later a technician came to my house to install the units during the December month all well fine my normal debit order for December went off for R332.56 for both cars ….now come End of January I get two debits going of my bank account R116.12 and a R1019.86 I then made call to the customer center spoke to a consultant who advise me the problem was with them as they did not cancel my previous contract the "retrieve" before activating my "Recover " for each unit I was quoted R159 per month which would mean a Total of R318 per month would be deducted on my account …...I then spoke to Cynthia sidiki at call center whose gave me attitude when I asked to speak to a manager to raise my concern ..ive had it with Tracker poor service and *********** employees …... they even give you a reference number they tell you to use their name and surname