Mistreating a young child

With a sincere heart,that is broken by the school employees.I must say i am very disspointed with the school..the way the mistreat my sisters kid its sad seeing my sister's face every time she tells me about it..Kids will remain kids and thats why we have teachers to teach them.first incindent my niece was slapped in the face by the security quard on her face in class a 9year old and now yesterday she was slapped by some lady that i dont know if she works there or what..i called the principal in the first incident and asked her what was going to happen to the security guard she said she filed a report,no feedback sent back.i am scared for that child for i know how she feels every time she sees the guard.nevertheless the treatment she get from the school its like she can handle the while treatment she is a kid do something.Name of school Lethabo Primary School its in soweto Naledi.