Very Bad Experience with Cartrack

Very bad treatment I am currently receiving from Cartrack at the moment. I bought a new vehicle and had an arrangement with the dealership to inherit the existing tracker on the new vehicle and cancel the contract from previous vehicle at no cost. Since the dealership assured me that they have such an arrangement with Cartrack and I was made to sign all the necessary cancellation documentation,I never expected the issue to be that complicated.Now I am being called by Cartrack accounts department saying you owe so much money.etc. for early cancellation of the contract.Trying to expain my side of the story during their daily phone calls but no one seems to listen except for the increasing harrassment and threats. In addition, they are also still debiting my account for the previous contract that was cancelled,this time twice a month.I have never dealt with such a dishonesty and greedy business, and they dint listen to customer side of the story to resolved the issue.