Xiaomi India — Redmi note 3 16gb silver

Sir, i recently bought redmi note 3 on 30th march flash sale. The device was delivered to me on 5th april. Since the day i bought i am facing some issues. I hope you can give me some solutions. The very first day when i logged into facebook and messenger app while chatting and going through time line or news feed then profile icons of my friends or pages don't show their profile pics. And moreover notifications for facebook and messenger are shown late in notifications window. For example, if i am chatting on a chat heads and i would receive a message and even if i would have replied to that message a pop sound will come later 5 seconds and followed by notification in notifications window some 30 seconds late. I face another issue that is when i listen music from saavn app and if i simultaneously open camera or facebook app, then the music itself stops playing. Then next i have to open again saavn app and it will refresh again and then start. Next i recieved help from redmi india and i did try the steps they told me to follow but there is problem. I am attaching screen shots for reference. I downloaded the 1gb file but it was of no help. I was a lot more excited about using mi device but that excitement has turned into grief. I regret buying this mobile. It is leading to wastage of my resources. Apps are crashing way too easily. I can't even download a file in background while going through gallery. I am facing problem with almost all third party apps in one or another way. It's really hilarious. I had placed a request for replacement of my redmi note 3 device on 12 april 2016 @9:30 ist via your hotline. But so far there have been no update in the process. Day before yesterday i got a email stating that courier partners of xiamoi aren't able to connect to me. But they did try only on my alternative mobile number @18:21. Which due to network problem didn't connect. I called even yesterday again for replacement because yesterday's email informed me about cancellation of request. And again today i was told that i will receive update for the process but i didn't get any help or information from xiamoi. I think that since my 10 days from delivery will be finished soon that's the reason because which my request is being avoided. I hope my device will be replaced soon and i will be satisfied with the product and mi.
Thanking in anticipation.

Order id [protected]
Redmi note 3 silver 16gb
Naresh kumar
3a bb block east,
Shalimar bagh
New delhi-110088