when I'll be getting oreo update on my phone..plz give me fast...

plz help me...i am in a small problem...a voicemail notification is being shown in notification gallery from a long time..i want to remove it but its not...plz help me on how to remove this notification...plz...

I am heartily thankful to the Samsung team for giving me nougat update today...i am very glad working on this new Android version...

when i will get oreo update on my phone...