Complaint

I have received a letter from Yolandi who is a building manager the letter was delivered by Ben who has tried to assist in this matter and was helpful who is also a building manager in Silverton silver place..on the letter I was advised that my contract has been terminated and I must leave the property by June the 30 reason stated is that my son thorough stones to another building.. So I'm being chased away for a mistake which was done by my son who was not alone that day when the incident took place. I have begged the building manager Yolandi explained to her that im not from Pretoria have no were to go and my son attends Silverton primary and her response was they is nothing they can do we must be out bare in mind no warning was issued . fine I have no problem in regards to that as I've tried talking to her even my husband had to go to the office's decision still stands..seeing that my son was not alone why are the other kids not chased out as my son was not alone ?is that fair?.i will leave but i need my deposit to be paid back the same day they want me and my kids out not the 20 days I'm told of as I am not the one who put a notice I was advised to leave..