[Resolved]  Vivo Mobile India — not getting notification

I am akshada i bought vivo y66 on 28 july 2017. I am not receiving the notification for hike unless the app is open. All the settings of notification is enabled. I tried all the possible ways by reinstalling the hike app. By updating the versions. Still i am not receiving the notification. I had call the consumer care but the information given by them was not up to mark. Please give the solution. Thanks.