I had a similar experience and don't have a mortgage or any delinquent debt, either. They called and hung up before I could answer. Called back 2 seconds later. I answered and waited to silence for 10 sec before the called was disconnected from their end. They called back 2 seconds later, again, but hung up before I could answer. They called a fourth time. I answered and there was silence for 10 seconds or so before I hung up.

Asked for some name and the name is different each time they call. Message says return call to 800-447-2401 ext 5.  Call that number and you get a referral to 800-545-6700 which is press a number to be connected to "Hot Passionate Single Women" line.

they keep calling my cell, asking for someone i don't know. i tell them that there is no one here by that name (eric something) then i say put this down as a wrong number. they say they will, then they call again, and we do this all over. when i tell them they said they would mark this as a wrong number, they get mad at me. telling me this is the first time they have called this number.
i know you can report them for harassment if you owe them money, but what can you do if you don't.

these people call and don't say anything. what's the deal?

Shortly after I refinanced my house loan this past year, we started getting strange calls from a Dyck-O'Neal, Inc. of Addison, Texas here in Massachusetts.  We had and still have no idea why we would owe these people nor had we ever heard from them except for their really strange phone calls.  They say we owe on an HSA account. We have no idea what this is about and signed nothing realtive to this onerous company.  Why would the bank not tell us we owed these people when paying off one mortgage and taking on another?  They certainly scrutinized every scrap of paper at that time.  Dike O'Neal continues ot harass us w/ threatening phone calls.  We truly believe this is a great scam that should be reported to authorities.