Hyundai Milnerton customer service

On Saturday 19th January 2019 i arrived at your parts department at Hyundai Milnerton at 09:00 only to find the parts department still closed . I waited 30 minutes before the doors was open due to an employee being late. I then had to wait a further 10 minutes for the employee to power up the computer. I requested to have a belt for Hyundai 2012 model i10. After paying R1025.50 for this belt i then took the parts to my mechanic only to realise i was given the incorrect belt so much for customer service. I then had to purchase the belt at another parts shop. I logged in a refund on the 21 January 2019. Its been more than business days and i have not received my refund as yet . Called in to Hyundai Milnerton to query and no one is able to assist me , all i get told is how many places my refund must go through to before i get paid and i was served by the same parts person again on the telephone, surely he needs to understand there is a standard period for returns and refunds to be processed .

Invoice number : ********** 6