Bad Service

My son had an accident on the 1st of March the paramedic who helped us give us a form to signed when we got the hospital to acknowledge that he assisted and told that the will be a small claim to pay I asked how much he said less than R2000.00 and it be needed later not soon I agree and signed . A month later EMER-G-MED send me a bill over R5500.00 when I asked I was told that the paramedic used expensive medicine… . Bad service…