Guild Wars 2

I’m being dishonorable (not eligible for PvP) for the last 12 hours! Anybody knows what can I do about it?

wait 12 hours and don’t be a dishonorable player again.
You get such an effect if you leave a rated match in PvP. This functions as a boon and stacks up. Each stack last for 72 hours. If you stack 5 of them within 72 hours (so leave a rated match 5 times in 72 hours) you get the dishonorable status. This means you can’t enter pvp-matches again for the next 72 hours.

Not a bug and this is working as intended. This system was added to the game on august the 6th.