Citizenship

After 37 years legally being with green card in USA , pay all taxes and being lawful person, I went to my interview after 8 months, and I pass my examinations , but they request me to reappear to submit a form N-14 for some original certified court dispositions (they already had copies that I sended)for a court i had for a broken mirror -yes broken mirror -that I had with a car. I went 1,5 month after my interview, to leave them the papers and the lady in the office told me that I should keep the original and give her the copies so I did cause I supposed that she knows what to ask, she did had my form N-14 in front of her !!!
 Now I reiceive a denial and they wrote to me that the cost of denial I didht left them the original!!! I got very upset!!! How is possible from them to make such a mistakes? Now I have to submit a request for hearing again to speak about this fact ,that's so unfair , to waste so much time without being my fault!!!