Violent behaviour accepted at this school

My son (gr 5) was attacked by 5 gr 7 learners and not one call to me was made regarding this incident. This school advertise themselves as the top school in the East rand but the teachers bullies kids in classrooms as well as allow violent behaviour to go unaddressed by learners towards other learners. My son was attacked by older boys an no action against this ******** acts was taken. Further I wasn't even notified by the school of this attack. And he was left there at school eithout informing me with his attackers in the aftercare centre until i was done with work unknowingly of the incident to pick him up at 16h30 all though the incident occured in the morning hours at school. When i got there my son was just sitting by homself crying and noone even noticed. Bad supervision of the playground. No protection or action taken against the violence.