Customer Service Complaint

My vehicle was taken in on Monday 8 Feb due to the engine jerking when I drive it abs the gears not selecting accordingly when I drive it. I was expecting the process of assessing the car to not take more than 24hrs at most as it’s merely an assessment and not repairing anything. I’m now left without a car, I’ve exhausted tons of airtime calling to find out where the process is in terms of replacement and I am being told the car has not even been assessed yet. Schools open on Monday and I need to take my child to school, which won’t be possible since no one has any idea how long it will take to process my replacement vehicle claim. I am left frustrated and not mobile with no idea when the whole process will be resolved which is highly frustrating. I am not happy with how my complaint is being resolved, I understand there are other complaints and things to attend to but I expect the same efficient assistance I received when I was actually buying the car. I have lost out on attending an interview because I could not drive myself there and in a very frustrating position less than 30 days of what was meant to be a happy journey for me of enjoying having my own vehicle.