Very bad customer service, humiliated and harrassed by manager and waiters

I came to your restaurant located in water front Cape Town last night and I am quite disappointed from the service I got from one of your waiters and your manager. There was a situation that had happened were I had a misunderstanding with my boyfriend and called on the waiter to come confirm something which he did but really responded to be in a very rude way and I told him to call on his manager who handled the situation but later discussed while I went outside that he chased out my partner together with his staff. He was also harrassed by the manager stating that he will beat him up infront of people. Is that how you treat your paying customers? It really feels like a racial problem here in Cape Town that black people are always treated inferior because if it was white people it was never going to happen! I did not appreciate this behavior in anyway and I don't think I will ever visit your place again if this is how you treat your customers. I am with outmost anger honestly and would like for this to be fixed because I'm sure the business is always with good customer service.