Apple India — iphone 11 freezing a lot while using.

I bought iphone 11 worth 64990 from apptronix hyderabad on 15/12/19.
This is worst iphone i’ve ever used. Never expected an iphone to freeze like a micromax mobile. The mobile gets stuck to a notification screen and is not recoverable at all.
All i need to is to wait for 3 4 minutes to get it back to normal or keeping pressed the power button for atleast 30 seconds.
This happens frequently and i’m literally frustrated coz after spending so much money i’m getting a feel of micromax mobile.

Cut short, i need a replacement for this device coz not all iphones are defective i guess.

Thanks,
Ashish