LG G820UM flash

[Ravvel23]

Hello
I bought a lg g8 at&t and i didnt notice that it was locked
When I tried to unlock it I noticed that the phone is reported or unpaid
So, Is there any way to unlock it?
Or flash it?
What should I do?
I'll appreciate any help!!

 

[blaze2051]

keep it as a ipod or sell it