Thank you, so how do I go back to my old settings because ever since I started updating my software all my notifications are silence even when I switch them on... they just pop silently and don't stay on top of my screen... even whatsapp massage or text messages.
If this was like 5 years ago, maybe. These days, Samsung doesn't fully permit OS downgrades. It can be done but it's not guaranteed and I don't think I should be sharing such knowledge here so you'd have to do your research. I see that you're having notification issues so let's see if we can fix that instead.