BAD SERVICE DELIVERYMEMB

I am trying to get a medical bill paid and is now struggling since 23/09/2022 without any success. They keep on telling me that my request was send to their IT to get the code override. I ha e asked for a supervisor( Teamleader) to contact me to resolve this, but without any success. I have never experienced such badservice without any saisfactory solution. I have lodged 6 querries and written emails, but still nothing gets done to resolve this issue.