How to lock lost/stolen phone

[Les123]

Hii, I lost my poco phone. How can I lock it, My Mi account was logged in on the device, unfortunately I haven't been able to turn on the Find Device feature before it was lost. How can I lock the phone permanently?

 

[Madkilloi]

PROCEED TO NTC OFFICE BLOCK THE IMEI NUMBER..

 

[Les123]

Okay sir will try thanks po sa suggestion.