Persistent notification sounds on Samsung S6!

[AC Question]

I have just received my Samsung S6 on Three and I am having a problem with having notification sounds being repeated until I click on the notification. Is it possible to set it so that I get only 1 notification instead? I have gone into the app notification in settings and on thought the GMAIL, text messages, what's app messages and though they were set to notify once but they keep beeping and it's driving me mad.
Any help in sorting this, other than switching off the notifications all together, would be really appreciated.

Thanks, Di

 

[B. Diddy]

Welcome to Android Central! Go to Settings>Accessibility, and look for a Notification Reminder option. Turn it off if present.