Extremely unhappy client

I spoke to a consultant before getting an ambulance which i got approval for my 9 year old son who was chesty and had a high fever i did tell the consultant from elixi health that his grandmother gave him meds at 2am in the morning and i gave him meds for his fever that morning so when the ambulance came his vitals were okay. Upon reaching the hospital the clerk called elixi health and they told the clerk that i need to take my son to my GP which i did. The GP nebulized my son and gave him an injection and put him on antibiotics which proves my son was unwell. I still got a huge bill from ER24 who is contracted to elixi health and they refuse to pay that bill.