When I answered the call it was just silence. Not a word was said, so hung up after 10 seconds

Just music in the background

Caller: They won't say who they are

I had 2 missed calls in a row from this number, back to back. I called back and they told me they were 'a private company that handles senstive matters' - ie a debt collector. I called back again and there was no way they would give out who they are

Caller: Debt collector

Answered abd they dont speak them hang up

Caller: Debt collection

They don’t speak at all, complete silence waiting for you to talk for voice recognition, I answered and mute myself and don’t say a word.

Caller: Debt collection

Debt collection agency

Caller: Debt collection agency

Wouldn’t give any details