I was stopped in traffic and their insured car rea...

I was stopped in traffic and their insured car rear ended my car, I filled a claim since December 18th, an adjuster came and appraised my car and deemed it a complete and total loss, I was promised a rental car, still haven't got one, they don't take calls, hoping that you give up on your claim. This is a terrible insurance company. I am still fighting for my Mercedes s500