Around the beginning of every month I get a marketing e-mail from newsletter@shaw.sjrb.ca telling me about all the TV channels they want me to buy.  At the bottom of each e-mail is a link to unsubscribe from it.  I have visited it on multiple occasions but the marketing e-mails don't stop.  I called Shaw support and got someone to manually unsubscribe me but I'm still getting them.

Beyond cancelling all my Shaw services, what does it take to stop getting this spam?