Airtel — 4g is not working

Address:

Mandsaur, Madhya Pradesh, 458001

My airtel 4g is not working. It was few days before i was using 4g in my mi note 5pro comfortably but for a few days my internet speed has been slow down to 2g nevertheless it shows 4g sign at the top of the screen.. O have checked all the network settings seems there's nothing wrong with it... What am i suppose to do? I even recharged my phone with a proper 4g pack however it's still shows no speed... I can't even search on google the internet speed is that slow...