Calls daily at different times, doesn't leave a message, when I did answer no one responded  but background noise like a call centre, caller id reads only "somitel"

Idiots call back when hung up on! What am I supposed to do, save their feels?! I am home sick and these imbeciles call three times in a row all insulted... gotta tell them to f... off,Real treat.

When I picked up the phone, I put it on speaker phone. All I heard was background noise, no-one spoke. I hung up and saved the number on my Panasonic phone as number with a Call Block. Next time they call, my phone will ring once, recognize that number is on the call block list, and disconnect the call, while at the same time showing Caller Blocked on the phone display.