Pathetic service RE: removal and re-installation of tracker unit

We sold our Hilux and the tracker unit had to be removed and reinstalled into the new vehicle we bought. We phoned Netstar to arrange this on 31.12.2020 2 weeks later still nothing. We phoned them and they did not remove the unit from the Hilux yet and asked us if we could locate where the Hilux is in order for them to remove the unit (so much for a "tracking company"). We did this. Phoned them twice with the address where they must go to remove the unit. End January debit order went off for the removal AND installation of the unit which was neither removed or re-installed In the meantime we phoned them numerous times which then telephone lines just go dead/they put the phone down. It is 05 April 2021 and we have paid 4 installments for the use of the unit and the removal and re-installation and we still have NO UNIT to this day!!! Absolutely useless!