As you can see from your experience, without a lawyer representing your father he facing an uphill battle with the insurance company, and besides you, he has no one advocating on his behalf. Please feel free to call my partner Peter Ross at 404-812-4300 to discuss this situation.
While you may have complied with the field sobriety evaluations and breath test, that will not get a .13 reduced as you blew well over the legal limit. What you need is a lawyer to investigate your case and see if the officer made any mistakes in your case. That lawyer can also send in the request for your administrative hearing so that your license does not automatically get suspended, which will occur if the request is not sent in within 10 days of your arrest.