How did you release the bike without payment? did he sent you Proof of Payment via eft and then you discovered nothing was in your account? if so, you can report it to the police as fraud and proceed criminally. Once the police has located him and charge him. The prosecutor can give you his details and then you can proceed with a civil claim accordingly to recover your money. If you need an attorney in Cape Town, I am more than willing to assist. I do civil and criminal litigation
