Need advice how to do with bugreporting

I need the advice of People or Moderators about bugtracker. I often meet the reports of don't working quest but their status is "duplicate" "dismissed" which made few days or months ago or "Fixed" few years ago but quest still don't work in same way which already noticed in those reports. looks like someone just make search about bug and if see the status Fixed once just deny all same bugreports no matter which realm it is and when it was fixed without any checking.
How I need to do for make developers to notice about it is still bugged?

Are working of bug is checkable by admins/devs/GMs? How to prove them about it really don't work for players?

I have an experience how it is work and how to make bugreports and how to check them for validity { i have worked few years on WOTLK server in dev team)

I want to collaborate and help make the server better and open to dialogue and mutual assistance. But I am very offended that they are shaking off my work, like an annoying fly