Putting a childs life in danger

My child got sick because of his tonsils. we took him to Groblersdal hospital, my child is highly allergic to penicilin. this was told to the doctor, it is also written on the cover of his hospital file. The doctor sent my child to get two injections. after a couple days my child started to have a reaction, he was taken back to the hospital where one of the doctors confirmed that there was penicilin in one of the injections. I made contact with the head of the hospital and told her my child is having a severe allergic reaction. She told me to bring my child back to the hospital, i did take him back yesterday, numerous doctors were looking at my child, they told me that there is not penicilin in the injections. They told me he was injected with voltaren and with Rocephin. Rocephin is not to be given to anyone who is allergic to penicilin, my childs whole body is covered in a very bad red rash, it is burning him and is very itchy, i feel as a parent that they just ignored the fact that he is allergic to penicilin, if he gets enough penicilin in he can die, i cannot afford a attorney, what is my way forward on this, i need help please.