caller used an autodialer but did not leave a message, probably a telemarketer

This is some solar panel company that keeps calling me asking me to put solar panels on my house. I do not own a house and I told them this multiple times, each time asking them to delete my number off of the list. They say each time they will and yet I still get calls. They just called again and when I asked them to delete my number from the list they demanded I sing a song on the phone or they would not delete my number. Beware of this caller. They will waste your time just for the sake of wasting time and try to use you as a puppet for their own entertainment. Completely ridiculous. Would not allow me to speak to any sort of manager or give me the name of the company to file a complaint.

Called me 6 times today. Tried calling back but clearly a tellemarketer

These people have called every 30 mins and they are so rude when you say don't call.  They start cussing on the phone.