My phone app blocks their call because they are known scumbags. However it allows them to leave a voicemail. So they left a voicemail message, 3 minutes long of dead silence. Have no idea who this is but hope they go away. I'd say this qualifies as a prank call.
Thanks to seeing "Account Svcs" on the caller ID I knew better than do other than what I did just now - answer and hang up immediately without saying a word. Scum sucking a-holes that need to be taken out and put into the old fashioned stocks and publicly shamed.