Hell sir madam My name is MamaI

Hello sir/ madam. My name is Mamta.I have enrolled son in kidzee pre school in sanjay nagar .initially everything was ok.but after sometime my son complained that his class teacher pushed him,slap him and even hurt on his private parts.I complained the school abut it they shown us cctv footage only for 10 15 mintues.when there is nothing happened.so we leave the matter.but my son is now beaten by other teachers⁶ also on his eyes,pulling his hair,snatching his id card.Now my son is telling me that my class teacher touch my private parts badly.My son is just 4 yrs old and he told any times while crying mummy you come with me and hit my class teacher.I have stopped sending him to this school now.but school people not showing anything properly in cctv and all the time ignored my complaint.please help me what I should do now.