Hertz has the worst service EVER!

My partner and I were involved in an accident with a tourist who had hired a Hertz car. It has been two months of back and forth and no answers. We have submitted all the required documentation and after an assessor was sent to look at the car Hertz has not bothered to answer a single call or email we've sent. Could you please give us contact details of someone who works in your Cape Town office who actually does their job. Valencia on ********** 538 does not answer calls or emails, and the general office number: ********** 4500 rings without being answered. Your call centre is useless, so please do not give us a generic number.