calls and doesn't leave message on a regular basis

Call me multiple times and never leaves a message so I blocked the number

called (barely spoke recognizable English) asked me to verify my name and address. Verified my name but refused to verify my address until I knew who they were and who/what they represent. Kept repeating their company name but refused to tell me who they represented I said "I am not giving you my address until you tell me who you represent"
and then hung up when she repeated the SAME speech of a whole lot of NOTHING. Said OK BYE
I have numerous medical debt for my daughter. I own up to that. Pay what I can when I can but I am not going to verify any personal information to someone who can barely speak my language when they refuse to tell me who they represent. You only need to verify my name to speak with me.
I know my rights

I get calls from this number, I have no past due accts that I know of.  I ignore it because they never leave a message

I have no past due debt and I got a call from this number.  I would assume they are up to no good.  I don't answer numbers I dont recognize, so did not talk to them