Recording,called my cell phone

This number keeps calling my cell. I am unable to call back, it comes up busy. I tried to block the caller from the cell and it doesn't work.

Are you tired of all those annoying debt collector calls?

I want to know it, whos number is this?

Collection agency calling regarding a neighbor--- like the neighbor needed help and this person needed to get back in touch with them about a personal matter. Tried to get info about the neighbor...Employment, family, wanted a message delivered to them. -DO NOT WANT INVOLVED. Agent would not give his name/company name. There needs to be limitations set on these agencies. They should not be allowed to harass other people--or-- the people they are trying to find.