No feedback on part ordered

I took my Daihatsu Terios to Kia Motors in Boksburg who is the servicing agent for Daihatsu from what I have been advised in January. After having kept my car for 10 days and trying to elliminate and trace the fault on my vehicle I was advised that the part had been ordered in January and couldn't give me an ETA. After a number of follow ups and some 6 Weeks later I still have non idea when my car will be fixed. I cannot believe in this modern age and with the technology available that nobody can tell me if the part has even been despatched and when it can be expected how ridiculous is this. I am at my wits end and don't know where or who to go to next ???