Removing your number from the list is really a 'confirmation' that your number exists.  There is no motivation for the sender to stop.  This isn't new spam, but it is persistent.  Called my telephone company a year ago about the annoyance.  I still get calls.  Hopefully, this fall, when the new "do not call" database is in place for the nation, junk like this will stop.

Today I've received 6 calls from that number.  It's a fax. I've finally connected my modem in order to receive the fax.  The name of the company is Canadian Trade Index.  There is a toll free phone number : 1-+1 877-463-6284.  I called and I leave a message telling them not to continue.  I hope it will work.  I goggled my phone number and I realize that somebody else had my number as it fax number in the past ! I owned that number for 5 years ! (Excuse my english, it's not my mother tongue)

I tried entering 00000 when prompted then by 604 cell phone number after the first call but I got 3 more calls after that.  How long should it take to remove someone's number?

Doesn't stop calling our main home line allday long anywhere from 10-15 times daily

Finished typing this note and it phoned another 10 times.  If you just hang up, it calls back immediately.