worst service ever provided.,

I had an accident on the 27th of July and while Discovery as my insure where dealt promptly with my claim and authorized it on the 7th of August. their preferred service partner Renew-it Sandton have provided the worst service I have ever received in my life. I have wasted large amount of money calling my service consultant Ilhaam who does not even have the courtesy to return your calls. and lately a I have been assisted by Edna who promising to provide feed back however never keeps her word. my car was due for delivery on the 29th August today it is the 09th September. I have been advise that the is an issue with the radio, aircon and hooter which where working perfectly find even after the accident. however after the repairs the is all of sudden a problem. They are not willing to give me a courtesy car. their landline rings endlessly when you request to speak to someone who can assist you. Discovery who is my insurer who gave Renew-it my car are not even bothered to assist me. I have called and complain a number of times and all the say is that the will contact Renew-it and give me feedback which never materialized. this is the worst experience I have ever had with and insurer and their service provider.