If you feel that their findings were incorrect then you can email then at:
Even if you do email them the chances of something being done is slim to none and there are consequences for putting forth a petition.
This might be a case of more than one person using the same computer for the combine and as such you may have been listed as a multi account violator. However even if this is the case I doubt anything will be done as it would have been your responsability to inform the multi account team. Please refer to the multi account rules found at the following link for further clarification and before carrying out any actions in response to your banning.