Bad and poor services from cartrack

Bad service recieved from cartrack, cancelled my contract with them immediately I discover that they signed the contract on my behalf without my concern. Sandiswa Chabalala the supervisor even send me an email that explain that the contract has been cancelled with immediate effect and the cancellation fees has been waived. To my suprised they keep on deducting on my bank account the worse part is they deduct double premium. I spoke to Sandiswa Chabalala several times without any assistant.