Official unlock bootloader said unlocked, but it did not work

Need advice please. Had permission to unlock phone , used mi unlock tool, unlock completed 100%, but phone is still locked. Tried unlock again, at 50% stops and says no need to unlock, so guess it thinks it is unlocked, It is the snapdragon model which according to what I have read should unlock on global stable 7.2.3.0.
Tried to request new unlock from mi, their system will not let you request second one,I have read the unofficial method, I'm reasonable on flashing but the warnings put me off. Any ideas how to proceed? Thanks

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