Cartrack has poor service

I used this company since 2016, in 2019 received a message than tracking Unit is not responding. A technician was sent to me, after assessment, he said the unit needs to be replaced, when he got to the office someone from Tracker called to say I must pay for a new unit which I refused. Made a cancellation of the contract telephonically. Installed a new tracking unit with Cartrack which has been very professional until now,Now July 2020 Tracker Connect has handed me to attorneys for not paying for a tracking unit not working, which I made officially made a cancellation on