Change of tracker to new car, no service

In the process of buying a new car. I would like to move the tracker to my new car. No where on my contract that I signed, did it state that I need to pay R600 to refit the unit in the new car. The contract states that I can move the device to any other new car. I only get told that I can cancel and pay a penalty fee or pay the R600 but no options as per my contract? Netstar has a opportunity to keep a customer happy but would rather charge them, instead of sorting the customer out and having a long term customer. This is not very consumer friendly service! Especially when considering that Netstar are happy to collect my debit orders every month!