Illegal debit oder and my son is dying

Please help. I don't work I received grant for my diabetic child. This company is debit money from me every month and I don't know them went to Fnb and explained that I don't know this debit oder. I contacted the company they said they will fix the issue. Please help they dint do anything they still debiting. I can't afford to buy medication for my son because of this company my son is dying please help. I'm not working I receive grant of which this company is debiting and leave me with nothing. Can someone talk to insure group managers on my behalf because trying to phone them speak and instead they continue debiting the money. I don't know them please help. My son is in pains I don't have medication for him. Please help