36 days without a car or communication

My car was in an accident on the 16th February 2019. Car was taken immediately to Renewit Randburg and was fixed there, delivered on the 15th march 2019. 5 days was enough for me to notice the car had problems, it would switch off in the middle of nowhere, not start, shake as I’m driving and stuff. I finally got stuck on the 20th going to work and car was once again towed to Renewit Randburg. I keep calling to ask on the progress of my car and Renewit refuse to fix the car and say it’s not their fault, Renault Roodepoort refuse to assist with the issue saying it’s not on their side and I will be charged if I bring the car, they will not even tow it to Roodepoort plus I will be liable for the fees to fix the car. Well, budget insurance on the other hand are not helping at all. I have called on multiple occasions and no one seems to know what is going on and everyone said they will contact me and to date no call has been returned. I’m sent from pillar to post and the last 2 names I recorded was Nkululeko and Renato who also promised to call back and I’m still waiting on them. Today marks 37 days without my car. Is this fair for 3 companies to not be able to know what to do with 1 small car like Renault Kwid? No communication whatsoever! Should I continue to wait? At least advise what I should do...