Statement required urgently

After 11 months, I was contacted at 22 November 2022, requesting payment for an 'overdue' account relating to a visit at 17 December 2021.

I pointed out, by email, dated 22 November, to the accounts clerk that I provided an authorisation number at the date of my visit, in person, on the phone and later in the same day by email. I also provided my medical aid statement from that period, reflecting that no effort was made to claim the visit. In this email I also requested a R0 balance statement.

23 November, the clerk responded, after repeated requests by email for urgent resolution "Dear Rudy, Thank you for your email it has been sorted out!"

At 22 November, in my second email, I requested a R0 balance statement reflecting I do not have any amount owing to the Dr or his offices.

I have made 5 separate requests for the clerk to provide me with a R0 balance statement, however this request has gone unattended, with no response.

I need my R0 balance statement to prevent this happening again due to the lack of professionalism that has been reflected.