What to do when no matter how many court/legal numbers you call, no one answers your question and just endlessly transfers you or hangs up?

Location: Clark County, NV

I am overseas, I can’t just walk in. It has been months of calling numbers at the courts just to be hung up on or endlessly transferred to other departments who do not know. When I’ve asked for supervisors, either the supervisors also don’t know, or I am not given one. I am trying to find out a detail regarding when a juvenile record is automatically sealed at 18, whether the state central repository receives a notification of this or not.