To stop receiving phone calls you have to mail in a letter ( registered mail) to tell them to stop calling you at the home number. Every month you must do this. If they call you at work, it takes one time only for you to tell them to stop calling you at work. You can make a complaint if they should call you again. Legally, they can call you 3x a day. Can't call on Stat Holidays. Every province has a time they start from and finish at. They can't impersonate anyone, they can't speak to anyone but the debtor, they must identify themselves and where they're calling from.
I used to work at NCO Financial doing collections for Telus Mobility and Rogers. In all reality guys, there is a cancellation policy regardless of whether you like it or not..its a contractual agreement and its unfortunate that no sales people tell you about that part of the contract. I don't work there anymore obviously because I found it to aggressive. I was one of the nice people that would actually work with you rather than fight with you...Read up on your collection laws in your province and find out what your rights are. (And maybe review the contract you signed as well) The CSR should do a financial statement with you to see what you can work out. Their first demand is always payment in full but did you know you can ask for a settlement amount? that would have to be paid in full. Did you know that if you send them $20.00 a month and make your postdated payments via your bank and provide them with the reference numbers, they'll stop calling. They can't refuse a payment so don't screw up and miss one lol
Good luck....just a few helpful hints...

These guys have been calling me twice a day "with an important message" . This is an automated message. They ask for Hernandez Rodriguez and say "if you are that person, press any key for an important mesasage". If you press a key, out of kindness to tell them you are not him, you are told to "hold for an operator". What a stupid way to do business. They eat up my cell time while I wait, because there is no option to tell them I'm not Mr. Rodriguez. If you hang up they keep calling back. I finally tracked them down to Global Credit & Collection Inc.,in Markam, Ontario. After three tries (2 hang-ups) I finally got throught o them and the receptionist said they would delete the number. HOWEVER, this same things happended a year ago and they asked for the same person then. After doing the same dance for a few weeks, I was told the same thing. They seem to have resurrected the file and the harrassment.

They also have a toll free- 1-+1 866-350-1405Still trying to figure out why they are calling - they keep calling my business phone but they have been ignoring; this is the first time they have left a message but they don't identify themselves. ?The message just said that he had had a "business matter" forwarded to him.  When I try to call him back at his extension I can't even get to his voicemail.

F***!!! me too!! they called me 3-4 times every day and early in the morning too!!!can anyone please tell me how to prevent them from calling me again? i use telus

I have received a call today from this number on my company cell phone. I do not give this company number out to anyone.  So, I am unsure how they received my phone number.

They told me the same thing...   but after a few months they have started up again....