Harassing me about my neighbor

I've gotten calls all hours of the day and night, they keep asking to talk to Edna. I keep telling them there's noone by that name living here. When I push as to who they want they hang up, when I call to talk to them, all the circuits are conveniently busy, according to the recording.
The only Edna I know is my next door neighbor, what gives the right of collection agencies to harass
me, to collect from my neighbor? Although this company didn't say they were a collection agency, it's obvious because I've gotten similar calls for Edna's daughters, I've also gotten calls for other neighbors this is not right.