Outstanding balance

On the 21 December I draw blood at pathcare I have received an outstanding account I called them the lady informed me that there's no outstanding balance, March I received a call from that I have an outstanding balance of December I asked him to forward the detailed account so that I can forward to the medical aid to date no statement was sent to my email address. I have sent several email requesting feedback on my request no response from them on the 21 April I received a call stated that my details were incorrect on the form I submitted for the drawing of blood that is why they could not inform me or sent the account to the medical aid which is not true because everytime after I draw blood they call and inform me about the results and the dosage as I draw blood for INR their negligence of forwarding the email to my medical aid cost me because their charges are for private patient now I must pay the higher amount for their negligence when I told the consultant who called on the 21 April 2023 that I am not satisfied their their service since I was using them since 2006 he told me I am welcomed to take my service to other service provider. I thank you pathcare!!!!