Deposit Refund

I checked in at Hilton Hotel Cape Town CBD on the 30 January 2018. Upon my arrival I was asked to deposit R500 to my room for possible extra in my room service of which is refundable upon check out if nothing has been orderd. I this case I didn't order any room service because I arrived around 23h00. When I checked out I requested for that refund and I was told that it will be transferred immediately back to my credit card. I made a follow up on Thursday and I was promised that it will definitely be on my account by close of business. I made a follow up again on Friday and again I was promised that it will be in my account immediately. That money is not back in my credit card. I want my money back. Furthermore the service was so horrible, the treatment that I recieved there during breakfast was so prejudice and unfair which boarders along racial lines