If you submit Friday late Night or after Friday, you wont get code before monday.
Once you submit, we cant cancel or Refund for any circumstance.
Reason for code not to work is either carrier has changed unlock code or simlock data is corrupted
1: Majority cases when phone ask for NCK code - dial the Unfreeze code in the NCK box instead of NCK code and it will say fail. With the second attempt dial the correct NCK.
2 : Update the phone software to fix the damaged or corrupted SIMlock data .