[Resolved]  Flipkart — internet & network issue nubia red magic 3

Address:

Flipkart Internet Private Limited, Buildings Alyssa, Begonia & Clove Embassy Tech Village, Outer Ring Road Devarabeesanahalli Village, Bengaluru 560103, Karnataka, India, Bangalore, Karnataka, 456010

I purchase nubia red magic mobile phone from flipkart order id od[protected] price 35299 rupees.
This mobile is very horrible product i am very tired to do restart it again & again.
When i use mobile hotspot, internet always gone within 4-5 minutes, many times my mobile goes hang position.
Many times network not working. Massages not come when i restart it then massages comes. I do complaint many time to flipkart but always they say we are try to resolve your issue and when my return period is over they say to me go mobile service center. But my phone is new brand and
It is faulty product why i go for service center.
Please do help me.