Dunno if you have been able to unlock your phone, if you haven't try this website it is good,
www.mobyrepairs.com, you will need to send your phone to their office to unlock.
I had same problem with my 6500 slide it was locked on orange, they said its gonna take about 3 monhs to unlock it.
I sent it off to this coy they unlocked and debranded the phone from orange, within 2 days, they removed all the orange software in the phone, now using it on virgin 300mins and test.