Renault SA After Sales Service Non-existent

Appalling after sales experience due to non-availability of parts. Vehicle has been with Body-shop for 3 weeks and some parts have still not been received. I have due to the damage to the vehicle not been able to drive it and had to acquire a courtesy vehicle via insurance. I now have to return this vehicle. I have raised concern on Renault SA Customer Care Website and was called back. I was then referred to senior consultants and have sent e-mails to both Lebo and Brett who has not responded on mail or bothered to call me back. I will be without any transport as from Thursday. My question is? This is a 2018 model, why must body parts be procured only once a Body-shop place an order? On web-site aftersales commitment is made, that parts will always be readily available?