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...

It is illegal for these debt collectors to call you repeatedly after you have told them that you are not the person they are looking for.This is regulated by the Ministry of Consumer Services.I was having problems with a debt collector calling me for a relative's debt and they told me that they would keep bugging me until he called them. The collection company told me last night that there was no possible way to delete the number.  I simply called the Ministry and the agent called the collection company with me still on the line in a conference call.  They were instructed to remove my phone number and the person said she did.  I am to call back if I receive another call.  Here is the link to the ministry website with their contact info.http://www.sse.gov.on.ca/mcs/en/Pages/Complaint_Steps_to_File.aspx

seems like many people think it is rogers but maybe just a general collection agency as my cell is with telus but knowing rogers it might still be them...

These guys were calling me about an account that was real old. You can't expect me to pay for something from 5 years ago!!!  I tried talking to them but they didn't seem to get it.  I googled their company name "Global Credit" and found their website. I sent a request to stop bugging me.  A manager called me back a couple dayslater and told me they were closing my account.  The website is http://www.globalcollection.net

I've been getting calls from this number 3 times today and twice yesterday and all I get is a recording telling me that they have called several times to "solve my problem". When I enter '1' as directed to get more information I get placed on hold. I end up hanging up because I don't have time to waste and I don't want to spend any money on someone I don't know. I have yet to speak to a real person. The only problem I have is that they keep calling. There is no identification on their recording of who is actually calling.

what are they faxing you?