I gave birth in April and their nurse came and did hearing aid test on my baby without having a written authorisation by the doctor, now they want me to pay for the test because medical aid is refusing to pay it wants motivation letter why two test where

I gave birth in April and their nurse came and did hearing aid test on my baby without having a written authorisation by the doctor, now they want me to pay for the test because medical aid is refusing to pay it wants motivation letter why two test where done.very unprofessional of them to go around in a hospital doing tests on babies without authorisation. I’m now being threatened that I’m gonna be handed over to lawyers that’s really unprofessional of them to do such.