License Plate Compartment I Parked My Car In A Parking Lot In Oceanside, CA...?

I parked my car in a parking lot in Oceanside, CA...? - license plate compartment

I have a ticket for not with my sticker on my plate (I was in my glove. I have lost my ticket violation. Well, who do I call to support what they are doing? "Should I call the police in Oceanside, CA where I my tickets, I should have the DMV, or is there another contact? Please help!