After having received about 10 messages from Kanoodle saying "your account is at 0$ " and replying them saying I don't want any more messages, I decided to try to delete the account but I was not able! Is there a possibility or should I send them a nice letter? Any experiences?
Just block them. Simple as that. If you don't have blocking features, then write them a letter to abuse@kanoodle.com with the subject "REMOVE ME" - I'm sure they'll read it and help you out.