Are you sure you typed one of the key words correctly? "/isearch Radiant" (without the quotation marks). Any typo will result in the search showing incorrect results.

While it sucks that you can't find your weapons, you're not really helping yourself by creating multiple tickets. It'd just continuously put you at the back of the ticket queue, which will cause it to take even longer for you to get a respone, considering the long wait times they generally have.
This is also the wrong forum. Technical support is for issues outside of the game (game client crashing, unable to connect etc.), while your issue is an in-game related one.