Distasteful Customer Service from Renault Centurion

I have just received the most distasteful service from Renault Centurion. I spoke to a very rude person by the name Backy from the parts department. I called to inquire about break pads he requested my vin number and I asked him to hold while I look for the vin, thereafter he slams the phone. I called again and the same person picked up the phone and was continuously rude to me when I asked him why he slammed the phone on me he then said to me he cant help me without a vin number before slamming the phone again. I called again and the same guy picked up the phone, I said asked him why he concludes that my query requires a vin number before I can even finish speaking. I insisted that he hears me out. I asked if there was any other place were I can get renault break pads either than the dealership since the dealer price is too high. He responds to me and says I cannot buy them anywere else I then said to him that that cant be correct to say that renault dealership is the only place to buy parts especially for a car that is nolonger under warranty. He then said why am I driving a car that I cant afford!!!!!!!!!!!!!!!! I could have slapped him over the phone for saying that to me. He then spoke to someone else in Zulu and said please talk to this impossible lady I don't have time for this!!!!!!!!!!!!!!!!!!!!!! yerrrrrrrrrrrrrrrr!!!!!!!!!!!!!!!!!!!!!!!!!!! what sort of nonsense is that? Who speaks to a customer in such a manner? I was taken from pillar to post when I requested to speak to the manager. I demand an apology for this behavior since your employee and no ground what so ever to speak to me like that. Nxa