Crazy Qc, it's a shame that you had to learn this valuable lesson. However, there is very little that can be done via the forums to resolve this problem.
The best (and only) action you could have taken was to report these players, soon after the event in-game. Your report/s would have flagged the accounts to Jagex for further monitoring.
I hope that you overcome this setback and that your future gaming experience is wonderful.