"Then when Judas, his betrayer, saw that Jesus was condemned, he changed his mind and brought back the thirty pieces of silver to the chief priests and the elders, saying, “I have sinned by betraying innocent blood.” They said, “What is that to us? See to it yourself."" -- Matthew 27:3-4
During the 2010 season, Major League Baseball umpire Jim Joyce made an errant call that cost Detroit Tigers pitcher Armando Galarraga the victory of a "perfect" game. While MLB Commissioner Bud Selig clearly acknowledged the call to be in error, he refused to overturn the call. With great emotion, Jim Joyce apologized to Galarraga at the beginning of the next game, but while the apology was kindly accepted, nothing could change the call that cost a "perfect" game.
In a far more significant set of circumstances, another call was made that couldn't be reversed. Judas was disturbed at the outcome of his betrayal and changed his mind, but it was too late. He had walked with Jesus for three years and never fully trusted the Lord as his Savior. When he realized his error, he acknowledged having "... sinned by betraying innocent blood". No amount of remorse could change the call that led to Calvary for Jesus and eternal condemnation for Judas.
Making a wrong call can be quite life changing. The most significant call in life is how you respond to the Lord Jesus Christ. This call can never be reversed in eternity. You may apologize all that you want, but nothing will change the lost condition of your soul. Be wise my friend and make the right call about Jesus... your "perfect" eternity depends on it.