I'm sure I've done something (unaware) but out of the blue, every time I send a text I receive a notification called a "delivery report." It is so very annoying. I know the person has received the text and responded. I have gone to settings and cannot find any way to turn it off. I've read online where you go to settings and then something else and it has "notifications for text" where you can turn it off. However, my phone does not display anything of that nature. Help?