Keep calling my house early in the morning, anytime of day, and ask me to wait for a representitive for an important business matter

Keep calling my house early in the morning, anytime of day, and ask me to wait for a representitive for an important business matter. I have tried to call them back to demand they quit calling and they refuse to answer.

I get this local number but when I call it back it is in California. The recording with information is from 2002. It is a debt collection service but they talk so poorly I can't understand the name and since they haven't updated their recording since 2002 I really wonder who they are.

A call from this number came in at 11:53 p.m., the only thing on caller ID was Hudson CO and the number.  I answered but got complete silence for about a minute before they disconnected.