Keeps calling they know are names, call answers then keeps saying please wait, on the phone for 5 minutes hung up and called back doesn't exist

At least 6 times a week for the last month or so hangs up when answered. Gave up trying to call back as always got busy signal. Must be auto dialer. I'm also with optus

keeps calling and saying I have a case number

Never leaves a message...googled the name of the company, they are a debt collector

called my phone *which is on the DNC list* it was a recording so I pressed 9 to talk to customer service and the gentleman. JOHN. told me you dont qualify retard and hung up! I want a direct number to this company and I wont stop until I reach one! Im the retard because I hit 9 to tell the retard calling me we dont own credit cards and that they cant read a number on the DNC list. Yea ok, I will get my justice.

call several times a day on my cell. did not pick up.