Zero response

I was in a car accident on the 18th of October 2017 and the car was sent in for assessment on the 24th where I recieved reasonable feedback from Nelisiwe (the agent whow is handling my claim) for the first 2 weeks. I was informed that my car would be ready within 10 days after the assessment was completed. It has been 8 weeks since the assessment has been done... I had no luck whatsoever communicating via email and I have been phoning every day since, but can't even get through to the agent handeling my claim. I have left numerious messages with other agents; due to the fact that I could not get a hold of the agent which was assigned to my case, wrote a reasonable email to the complaints department; trying to keep the issue in-house and I have been phoning the panel beaters-HJ Bosch and Sons Centurion relentlessly, but still no luck.. Management at Hj Bosch And Sons won't take my calls and have provided my with deadlines which they have postponed 3 times already. I am rather concerned regarding the repairs to my car as I saw that Hj Bosch And Sons Centurion has had horrible reviews the part year... I feel that I have been a very patient client with reasonable requests, but this has gotten my nowhere up untill this point. I truly hope that this issue can be resolved quickly and that the repairs on my car will in no way reflect the horrible customer service I have recieved thus far, or rather the lack therof.