third party accident - one month no claim number

my accident occur ed on the 01 july 2015 , whereby my vehicle was hit from the back by an avis rental vehicle. to date i have not received any claim number nor any feedback regarding the claim. this is shocking and disturbing. if allegations are made surely the rental car driver should be contacted and asked. my car is now left with a dent and every time i call i have to refresh the customer service memory of the claim. i have sent all correspondence as asked and now cannot get an answer as to why this case is not being attended to . people should never make use of such an unresponsive company. as i type now today , i was made to wait 12 minutes and still now answer. told i will get a call back in three minutes but will never get a call back. i hope and pray something is really done about this. shocking. sent a email to the manager of the department and still no answer and response.