What Does It Mean If A Defendant’s Bond Is Forfeited?

If the defendant does not appear in the court when he is asked to, the bond is forfeited by the court and the judge orders the bail company to find and bring the defendant to the court within 180 days failing which the bail company will have to pay the full amount that was posted in the bail.

Can The Bail Agent Arrest Me And Put Me Back In Jail For Any Reason If They Want To?
Is The "Bond Fee" Or "Premium" Paid To The Bail Agent Refundable After The Case Is Over?