Bad service and no lack of communication

I had a problem with my car so I took it in to Toyota motus Parktown to be checked they said it was injectors this was on the 10/06/2022. They called and said it will be fixed by the 14/06/2022. Then it will take 6 weeks to procure and install in the car since they are on back order and later said November. All this time I’m the one calling them (using my airtime), they are just sitting with the car and without any update, so on the 17/06/2022 I called Toyota SA they promised to look up on the matter and call me back, this was Friday. Until now no one is calling to give me any update. So anyone assist on what to do next as now I will be paying for the car that is sitting with them until the time they decide to fix it. I travel 30 km to work on a daily basis it’s like they don’t care