Unprofessionalism and rude attitude no assistance

Ordered and paid for ve polo tsi control arms and road ends 26 Oct 2022 and was promised that they will be available next day 27 Oct 2022 but I then said I will collect 28th as mechanic will be working on it. But sadly on arrival Saturday morning parts appear available on the system but they could not be found. I then asked to speak to the manager for him to make plans for me to get the parts. To my surprise I was met by a rude manager telling me all sorts of excuses about the parts not being loaded on the truck from their head offices. Made me wonder what kind of ordering system do they use. We then asked for a refund of which we were given after shouting and being left standing there having to understand goldwagens inconvenience and unprofessionalism from the manager. If parts are on back order make means to inform the client so we can make alternatives. More so please fix your inventory issues. Really disgusting attitude from Mr manager.