Bad service of cartrack

Im so disappointed in Cartrack.they blacklisted me after I canceled my contract with them at the end of thier 36 months term.now they requesting me to pay them R1800 to remove me.the problem started when I took out a tracking device with them.the device wasn't operating properly and they called me to change it of which they did.at the end of the contract I canceled because I wasn't satisfied about their service.then three months after my cancelation the called me and demanded I pay them.then I refused then they handed me.to nimble group.i then paid nimble group.provided them with settlement letter. I only paid just to keep them out of my life. They then went on to blacklist me.when their contract with me is settled and canceled.i requested my contract from them,they refused to give it to me.i requested voice recordings,they also refused to give.always excuses.please beware before u decide to use their services. Regards george in rustenburg.