If my dui case is not filed within a year prior to the date of arrest, will the court drop the case?

I was arrested for a dui 6 months ago and the case is no where to be found in any Los Angeles court. I was a juvenile at the time so there is only one court that handles juvenile dui in LA. I went to that court 3 times. The first time i went was on the assigned court date on the ticket, and the other two times were to check if it has appeared in their system. Since they were not able to find the case, i had asked one of the staffs to contact me when the case appears. I got her information so that if the court fails to notify me, I can use this against them. I am currently a student in San Francisco and this whole situation is very inconvenient for me so if the court/ PoliceOfficer takes more than a year to file my case will they drop the case? If so, can i get my license back?