Samsung Galaxy J7 Mobile Restarting by itself

#1
I bought a brand new Samsung Galaxy J7 Mobile phone and it keeps restarting by itself. I purchased it at 20% lesser price than market rate from shop47.com, but its brand new packed mobile. I was really happy until I noticed that it's restarting by itself every 10 minutes, I wrote back to company and still waiting, I don't know what should i do next. :(
 

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