I have purchased Note 8 on 21st OCT and also activated the device on 21st and also registered on My galaxy app. I got "Reedem your Free wireless charger" banner in My galaxy app but no Banner for Nevermind offer as said by the sales person of samsung...
I have received wireless banner third day of my purchase that is 24th. Have you logged into My galaxy app on 21st or 22nd. Also did u get Nevermind offer banner??
I have used this sim in Oneplus 3 and also Redmi Prime 3s but no such issue occured. There was option in the setting to enable or disable Volte but same is not found in note 8. Please resolve this issue asap.