No message left

This number calls several times a week.  Never leaves a message.

Calls multiple times and then hangs up no msg left.

This number keeps calling my phone but I refuse to answer numbers I don't know. They call my phone several times a day, especially in the morning, hoping to catch me off guard. This is a scam. Calling as a debt collector for a bill I don't have. They continues to leaves messages and continues to not answer them.