I have had the Galaxy S7 for three months. I am trying to figure out why I do not get any notification that I have a voice mail. Have I turned something off? I have gone over and over everything I can think of, but do not get any kind of notice. The voicemail icon does not show up at the top of the phone or anywhere else. I have missed 8 different messages. HELP! Thanks for any input you can give me.