Worst Service from a waitress!!!

Upon entering the restaurant and being seated by our very friendly waiter who was a male (named Alvin) we asked for a table by the couches. Once we sat down a waitress (named Bongani) asked as to why we were sitting there and we responded saying it was our preference. She rolled her eyes and spoke to another waiter in a foreign language which I could understand saying we took her table and we could have found another table. I addressed this with the manager and told him we did not feel comfortable. He made us feel at home but being a service outlet they need to revisit how their waitresses address their customers.