Calls and hangs up.

The number called me a few minutes ago. I returned the call from home phone. Male computer voice answers to tell me I should receive a call from a representative today or press 1 to be added to the 'do not call list'.  Pressed "1" ended the call.

Received call from this number twice in 2 days.  I didn't pick up and they didn't leave a message either times.

Received calls from this number daily for the past week. It always comes up with "Loan Approved" as the caller. Have called them back and got the same male computer voice telling me I should receive a call from a representative today or press 1 to be added to the 'do not call list'. Pressed "1" and ended the call. Yup, they continue to call.

Answered a couple of times and tried speaking with them. They don't speak back, but you can clearly hear a call center noise in the background.

Beyond annoying.

Yep, pressing any number to be removed guarantees you many, many more calls since you confirmed a working number and that someone is answering.