Call was slammed on my face

Plan number: ***

Appointment to remove my DQ tracker from a car that I was replacing, but no one pitched and when I called I was told system issue and then arranged for the removal of the unit from the dealership. I made an appointment to install the unit in my new car for Monday 19 August 2022 and no one pitched again when I called to follow up on the 20 August the agent slammed the call on my face and no further update since then. I am now losing vitality points and status due this, please revert with resolutions.