Airtel — my airtel 4g hotspot zte is not working properly

Address:

New Delhi, Delhi, 110019

Respected sir,

I have brought an airtel 4g hotspot zte (Model : mf920v) from your airtel representative on 20 october 2018.
But the very first day after my activation (24 october 2018) of the sim card (Phno:[protected]),
It is not connecting to the internet & the speed is very very slow so that i can not do anything with that much speed.
It is completely useless for me. So i need a solution to connect the device or i want to return this back and want to refund my money.

With regards,
Anup kumar
Cell no.[protected]/[protected]