Condescending cold caller from Matrix Tracking

I'm speaking purely on the basis of a phone call received, and not as a member or as a client, but this call cemented it in my head that I never want to use them as a service provider:

After a missed call, I received a call from this number again and I answered. At the time I did not know who the caller was. Truecaller eventually showed me as well.

The male speaker said that he is from Matrix Tracking, and he promptly asked: "About the tracker in your Mercedes Benz 180 ..." [clearly got the detail from a databases or more but that is less important for now] ... to which I flatly responded: "I don't have a tracker in my car, you're talking nonsense"

After my said statement, the calller from Matrix Vehicle Tracking started talking over me, therefore not allowing me to explain that I was not interested as I am sellling the vehicle in any case [although I do NOT need ANY reason to refuse]. While still talking over me, he told me that I should not be rude on the phone and that I should talk to people on the phone in a better way.

Matrix Vehicle Tracking, above the fact that cold calling is highly disrespectful from my perspective even though not *******, it is most assuredly unwanted, and in fact places the rudeness already on the caller and NOT on the receiver of the call - and still the caller was THE most condescending cold callers - and at the end of the call quite belligerent - that I have encountered in a long time. In fact, AS he was speaking over me while I was trying to explain why I am not interested, he put the phone down in my ear.

If THIS is how you try to attract new business, please count me out.