No one loses their freewill.
They may not exercise it and it weakens but no one loses it.
They may err in their use of free will, which may negatively effect future decisions, especially if the error becomes habitual, but no one loses it.
Adam and Eve could still exercise their free will and they did.
There change of circumstances lessened their options of how and where they could serve God, but they still had the freewill to choose to serve God.
When Saul was anointed king, he erred by not obeying God's words, but he did not lose his freewill. He could have, at any time, decided to serve God simply because it is the right thing to do, but he did not, he ended up murdering himself.
Saul of Tarsus, on the other hand, is an example of someone who chose to seek and serve God, he erred in how he did it, till Jesus Christ himself came down to witness to him, then we see that Saul turned his life from consenting to slaughtering followers of the Way, to becoming its greatest leader.
Free will is never lost, it may be ignored, weakened, burdened down, seemingly limited by circumstances, but is is always available for any live person to exercise.