How to convince ICC comitte to give a chance to prove innocence

We are four people and sexual harrassment allegations have been made by a female employee. The IC committee is done with the investigation and ICC has concluded us to be guilty without any hard evidence against us. The conclusion has been done only on the basis of heard conversations. Now Most probably the HR will terminate our services without giving us proper notice period. We want to save our Jobs and dignity at work place. There are a lot of people from the floor itself who can vouce for us, but the IC comittee does not want to hear our any request. Now before the company expells us, we want to defend our case by reappealing against thhe verdict. Please suggest the best possible way to save our jobs.