Unprofessional Chinese dentist clinic

There is a dentist called SUN MJ in the mall the Chinese ppl work in there ,my mom went to the dentist but it happened that the Chinese man didn't have a proper understanding with her my mom said that the Chinese man harassed her and he treated her like a child shouting at her while she was trying to explain to him that she had a problem with her tooth so my mom ended up leaving I don't understand why south Africa allows when these foreigners take advantage of us not treating us well so please have a word with this dentist clinic thanks