Made the mistake of registering details on a website (can't recall) they keep calling trying to set up Crypto trade account

They've called me repeatedly for days, never leave a message, I tried to tell the guy to take may number off the list, and he talked over the top of me, so I had to yell to get him to hear me, then I hung up, he tried to call again, I ignored it, but he rang repeatedly, when I finally answered he called me an effn retard.