My 44 year old son passed away last year.  These people call me constantly wanting his address.  I've told them the date and location of his death yet they continue to call and leave those messages" undeliverable package".  Help?

Probably time to obtain a call blocker device, app, or phone.
Google "call blocker" to see the various types, and find one that best meets your needs.

Previously same message but area code from Florida about undeliverable package
When I call back always said call is on line. Had that #blocked. Today got call from that 469# saying same thing. When I called back machine said company below and PST hours 9 to 5. Will call tomorrow. Definite scam but for what?

Got message about failed delivery. I have had that scam masters called before. Do not pick up the phone if you have a caller ID if you don't know the number calling you! Wait for the message. 98% of all calls our days are scammers or telemarketers . Do not get upset. Just low your ringtones volume and live your life. This is one of the disadvantages of our time. Do not give anybody who calls you your personal information . If you have to do it ask them to let you call back and check on line if it was a scam. Yes it's takes a few moments but protects your privacy . Buy the identity protection . In a long run it might save you tons of money. I wish everybody peace of mind .

Identity theft scam.