Hydra Glitch

Was just in a party who glitched out Hydra and continued to attack it after I had repeatedly told them it was a known exploit that could get us banned. 3 people stopped fighting Hydra including myself and we couldn't figure out how to leave the duty. I submitted a cheating report on the people who continued to use the exploit to their advantage. I have no clue how they glitched it out, but once I seen it happened I continually tried to get them to stop told them they could get banned. I would be willing to accept a roll back to before I did the hydra quest if at all possible.

I also have 2 screenshots of the conversation that was had after I kept telling them it was an exploit.