Unprofessional conduct and bad work ethic

About two weeks ago i took my car for a service at the kia motors dealership in Vereeniging and when I get there I decide to enquire about a fender liner on my left side of the wheel that has been damaged for a while. A quote was done for the fender liner including installation and I decided why not. A few days later they call to say it had arrived and it was arranged that I bring the car in for installation on the Monday the 11 th December and I get there I dealt with someone named Kurt who according to me has the worst attitude for a sales consultant. I then tell him that I can no longer afford the installation but will only pay for the part, okay he agrees and he goes around the back to fetch the fender. Moments later he comes back with it and then I ask him if it comes with clips to secure it, he tells me I can use old ones I then told him some of the are missing and some are loose And asked if they don't have any in stock. He then goes to the back for a seconds and comes back,then he says to me they don't have any in stock and if I want them he can order them for me for R18 a piece. I asked him how they managed to order a fender liner for installation and not order clips to install it, not forgetting the fact that the car was in their custody the entire day a week and half ago for a service. Someone should have picked up that a few clips were missing and had them ordered, I then ask him how installation was going to be proceed had i not cancelled it without proper clips to secure the liner and his response was I don't know hey I'm not the one who did this quote . For some reason I decide you know what let me just pay and get out of there, give him my card and the machine declines and he tries again and same thing happened. I then decided to go withdraw cash from a nearby atm and I get there its not working including all other at m's I could find. I went back to kia motors and explained the situation and that I would come back tomorrow morning. The next day I get there cash in hand I then told his manager a lady called Martha about the level of service I received the day before and how unsatisfied I was with his overall attitude and she says to me I will sort it out, I pay for the liner and leave,got home and decided to take the fender liner to a friend of mine who's a mechanic,I then took it out of the car and moments later I realise something is mismatch here and realise I had a wrong fender liner they had ordered a liner for the right wheel instead of the left like I requested. Not only did pay for something I didn't order but I also had the incovinience of having to pour petrol I had no intention of buying yesterday and the fact that I had to drive all the way back to vereeniging . I drove back and simply put the liner on the table with the receipt and demanded my money back cos they don't seem to know what their doing. She offers to order another one and I decline her offer and simply asked for my money back ... I couldn't understand how a company as big as kia could get a simple request or rather instruction so wrong . ....