hang up when answered

I have had multiple calls from this number and when I answer they hang up. Or if I don’t answer, they don’t leave a message and call back on a slightly different number. I called back today and was told it was a government initiative and I asked to be taken off their data base. The operator spoke very quickly and would not listen. I asked to speak with a manager and he became very rude, kept talking over me and asking how many power outlets I had in my home. He ended up hanging up on me.
Very rude.
Don’t bother answering and block!

Hang up when answered