Unable to unsubscribe from Homechoice

I have been trying for so long to unsubscribe from Homechoice emails and smses. I have even tried to block their calls and messages but I keep on getting them even if I have told them a million times that I do not want to receive any communication from them anymore ever since I got bad service from them. I'm so disappointed in them and the way they do business. You block one number, tomorrow they call or SMS using a different one. You unsubscribe on email and but you still receive them. I don't know what to do anymore.