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.
Since you refused to take the breath test, you need to (or better yet your lawyer) file a request for an administrative hearing within 10 days of your arrest or your license will be suspended for 12 months with no driving privileges. As to getting your DUI dismissed, more information would be needed to answer that question. Please feel free to contact me at 404-812-4305 if you would like to discuss your case in detail.
If you cannot afford a lawyer then apply for a public defender when you get to court.
That being said, since you blew over a .08 you need to follow the instructions on the back of the DPS 1205 form and send in a letter requesting an administrative hearing, along with $150.00, within 10 business days of your arrest or your license will automatically be suspended.