Calls several times a day and never leaves a message!!

Always calls everyday , all day long anytime from 8 am est till 10 pm est. They never leave a message and  it comes up unavilabe and i don't answer unavaliable calls. The last call  that i got from them said  Receivables Per----- something

Calls 2-3 times per day, several times a week, get dial tone after 10-12 seconds. No person has ever come on the line. Caller ID is RECEIVABLES PER.

When I answered the phone a RECORDING came on and said it had a very important phone call for me and that I should please hold because all customer service reps were busy with other customers. WHAT? As if I had phoned them? Anyway when a person came on the line I said Hello and What is it? and the guy hung up on me.

says Per R on caller id and I dont have verizon nor have i ever. Def a debt collector but prob more than verizon.