Micromax Informatics — Notification related problems

My phone doses not give me any notification of the messages I receive in what's app hike messenger insta and rest other also it doesn't support app lock by application such as app lock vault cm security. I have been facing this problem since I bought it in the month of July. I contacted the customer helpline but still they didn't come up with proper prosedure to fix it. Please help Asap
Model- Micromax unite 4