Why is my galaxy s7 not sending me notifications for messages?

[AC Question]

So for the past couple of days I haven't been getting message notifications from one person. I can get message notifications from all my other contacts but this one contacts messages will not make a sound. It has a mute sign by the persons name. I've tried everything and nothing is working.

 

[STARGATE]

Check that contact's info, make sure it has a notification ringtone and it's not blocked.