Same thing happened to me.  Will report to CRTC and anywhere else I can to end this.

Have been getting calls from (905) 413-8624 at all hours of the day 7 days a week. They give me an 866 number to call back on with ref # wishing to talk to me about the legal papers that have been sent to my address....I know Canada post can sometimes be slow (in busy times) but man I have been waiting for these papers for 7 months now. I am p----d most about the hours they call is there nothing that can be done...thats all thanks for listening.

We have been getting their messages for months and have laid a complaint with the DNC List +1 866-580-3625) - suggest you do the same!

Sick of their phone calls?
... give them a taste of their own medicine.

The information listed here is from their website.
http://www.natalelawoffices.com/index.htm

Note they have two addresses and several phone numbers.  
There is also several fax numbers too.

Their email address is: admin @ natalelawoffices.com

Natale Law Office

405 - 8133 Warden Avenue
Markham
Ontario L6G 1B3

1490 Denison Street
Suite 100
Markham
Ontario L3R 9T7

Ph: (905) 413-8633
Ph: (905) 413-8748
Ph: (905) 413-8624
Ph: (905) 413-8545

Fax: (905) 479-5407
Free Fax: 1-+1 866-207-9149

I GOT A CALL FROM (905) 541-8624 SAYING AN IMPORTANT DOCUMENT WAS MAILED TO A STRANGE NAME (NAME MENTIONED  NOT SPOKEN VERY CLEAR  AND SOUNDS LIKE A FOREIGN LANGUAGE). MENTIONED THAT  I MUST PRESS ONE IMMEDIATELY OR CALL 1-+1 866-262-9537. WAS DISPLAYED ON CALLER ID AS NAME UNKNOWN

yep, these creeps called me.
just blocked their #