State Farm blows, shadiest insurance company ever Options

[hellsyphon]

Well a new wonderful update on my sister's accident in my car. State Farm being the bastages they are have been dragging their feet through this entire accident. Since the old lady who hit my sister also has State Farm, it has been a friggin month and they haven't said jack and today I get a phone call from them telling me that the accident is 50% my sisters fault and I have to pay a 250 dollar deductable. I strongly believe that State Farm is screwing me over because the people handling the case are from the same office and when I called my insurance agent, she said that I cannot get an arbitration against State Farm when it is State Farm vs. State Farm and the only thing she can offer me is some kind of bargain that the other side has to agree to. F*CK THAT... that old lady is 100% at fault and they even said that when they called the DMV Instructor he said that they were both at the stop sign at the same time, but when I called him he said they only called to see if he was injured or not. **$#&$(#@&$*@ friggin bastages the whole bunch of them are. Its already bad enough that they are dragging their feet through all of this, but making me pay a deductable for something that wasnt even my sisters fault? that is horsesh*t. They also said I cannot take them to court unless its a claims court. God all these people are all the same. They are out to take your money and screw you over. Anybody know a bit of law because I'm gonna sue the hell out of these fraudulent bastages...

Cliff Notes: State Farm drags feet through case (~1month so far)
Puts 50% of blame on my sister even tho the other lady is 100% at fault
Demands I pay a 250 dollar deductable to repair car
Same people handling my case as the old lady
Says I cannot get an arbitration against them or sue them
Need Some Legal Advice