Laki S.

They provided following standard email as it is not possible to unlock it. They gave generic reasons for not able to unlock and none of them is valid.

---------------------Email extract from them

We apologize that on this occasion we have been unable to obtain an unlock code for your phone using the imei number supplied. We do not have access to the specific reasons for this, however the most likely scenarios are listed below, please check to ensure none of these apply to your phone:

The phone is blacklisted by the provider or reported lost or stolen
The phone is still under an active contract and the carrier has blocked unlocking. This is know as an unclean imei. If the phone was purchased second hand, we recommend that you contact the party that the phone was obtained from to receive this information. You can also contact your current service provider to verify this if the phone was not purchased from a third party.
The IMEI number submitted was incorrect