After repeated attempts to have the phone unlocked, it is still not unlocked and no one from Sprint is responding to my messages any longer.
I'd love to help you out with this. In order for the unlock to go through you need to have your phone on, plugged into the wall, on wifi with the Sprint SIM in. If you've done all of these you can press ## BRAND # which will restart your phone. Once it restarts, press ## SCRTN# and your phone should be good to. Please let me know if you've tried this before and if you need further help.