What to do when Wi-Fi and Bluetooth are not working on my Lenovo Vibe K4 Note?

Please help me i have lenovo vibe k4 note and my wifi bluetooth both completely not working even it's not getting start how to repair it plz help me have visited once thane tembhi naka lenovo care centre also my phone is under 10 months warranty they told me it's un resolvable we have to change motherboard that will cost you around 7000 and it's too much for me i can't afford 

That should still be covered by warranty. Have you visited the store where you bought it or a Lenovo service center?

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