Extremely bad service and incompetence

On the 2nd August i ordered a throtle body spring for my Hardbody from Thabo.He called me the next day that a part is ready for collection.I went there to fetch it and unfortunately it was incorrect order(Accellerator spring).He then ordered a correct part and said i must collect the next day.Knowing that the part was not in stok,he failed to call me and inform me and i had to drive all the way to centurion and arranged to come late at work for nothing.On the 19th i called him and he said the part is available i must come and collect it.I drove all the way to cencurion and another surprise again.The part in not yet there.The same Thabo said he has 2 Elias and he thought is the other one.I never thought such big and reputable institution like Nissan would have such frontline staff that caused misery to clients there.I already spent far much away the part money with travelling they i made to centurion