Kia Centurion - lack of service delivery

It is with great disappointment that I need to resort to social media to get a reaction out of Kia. I've been requesting urgent assistance from Kia Centurion to assist me in my car that battles to start. The problem is that they need to take my car in and offer a courtesy car and they did not have one on 16 May when I initially reported my problem in person. I explained that I will be starting a new project this coming Monday and really need my car to be fixed by then and once again received commitment from the Workshop Manager Kobus that it will be sorted this week still. It's already Wednesday and with only two days left for a problem to be completely resolved if they did not even started diagnostics or sourced parts, I'm a REALLY VERY concerned and unhappy client. Their response was that they had urgent work from Kia SA to first do so please Kia SA, can you instruct them to please attend to my very big problem in my life as well. Seems that they are not interested in any problems if it does not come from head office. Thank you.