unlock request

I bought a phone and wanted to unlock it,

but the answer came that I often do it,

and I did it only once.

Device IMEI number: [EDITED]

Request number: NUL264878620375

I got an e-mail

Looks like you didn't confirm your request.

Device IMEI number: [EDITED]

Request number: NUL264878620375

Hi PAVEL,

The link we sent you was only good for 24 hours. Submit a new request when you're ready to try again.

Then I made another request to unlock and I got an answer.

Because of certain AT&T guidelines, we aren't able to unlock this device.

AT&T guidelines won't allow us to unlock this device.

Help .