Why should I trust them with our well-being if they don't do their jobs?

I have had the worst service from Discovery Health possible. I requested that details be changed on my portfolio when I initially app**** with them as they could not read off an application form and look at an ID photo of my husband's ID copy to see that what they are capturing is incorrect. Details later changed and they had to make a small change on personal details for my daughter. If the change is not done she would not be valid under the med aid! I brought it under their attention various times via email which was ignored. I finally received an email where they declined the changed and they requested documents which was already in their possession. I received a call saying that my daughter, AGE 6, was applying for med aid! I decided to sort everything out via tel that afternoon. The consultant said that if I sent one document all will be sorted out withing 3 days. I sent it and I received confirmation via email and telephonicaly twice afterwards that the matter was sorted out and the details have been changed. The even called me to confirm the correct details before sending out the new cards. The consultant asked whether she should send me the new updated certificate which I said I would appreciate and then I saw all the details were still old. I even went onto the website and saw that everything was still unchanged. Various confirmations from various people in writing and verbal and still after weeks they cannot change a single detail on my portfolio. It is unbelievable that a company function and let things happen like this. What is next? What happens when my daughter gets into an accident and needs surgery? She has no med aid as they cannot even change a single thing like change a single detail. Why should I trust them with our well-being?