you need to give us more info, which model of phone do you have ? what network is it on and what type of lock did you use ?
I agree
Call the service reps for you cell provider and they will help you unlock it.
You can call the provider, and they will be able to help you. I've done that before and they helped me get back in.
Most generally its your fon # that is the code. Not alawys but it cant hurt to try it.. Good Luck.