How can I create "This mailbox is full" message that hangs up?

Hi,

I am in debt to some companies and don’t want to delete my number that is used for certain incoming calls. I also do not want to use a busy signal or a hang up. Is there a way to play a voice recording of “The mailbox is full and cannot accept new messages” (as an MP3 greeting or recording) and then just have the line hang up?

Yes, change your DID routing to “Play Recording”.