Getting calls every day - today I got 12 calls within 2.5 hours.  When I pick it up I get dead air and then put on hold for an agent then a disconnect.  Today I called the number back and some lady with a thick eastern accent answered and said something like CBV something or other.  I decided it must be a telemarketer, so I hung up.  2 more calls since. WTF? I am on the National Do Not Call list - what the hell is this?

it's a collection agency

Yes they are called CBV on Richards St, in Vancouver. Report threatening or abusive treatment to the government, under The Consumer Protection Act.

future calls  from  this no.  legal proceeding  will  begin

JUST  NOTIFY THEM  BY  FAX  THAT  FYTURE  CALLS  LEGAL  PROCEEDING  WILL BEGIN  CALLS  WILL  STOP