Statement Issues 1 Year Later - pathetic!

We visited Erasmuskloof Pharmacy on 15 October 2021 following a doctors appointment. More than a year later, on 27 October 2022 I received a call from Benita Adams stating that there was an unpaid account and provided my email address after which a statement was sent. NO PRIOR ACCOUNT/STATEMENT WAS SENT TO US IN MORE THAN A YEAR. Upon investigation, it became clear that the claim was only received and rejected by Bankmed on 25 January due to the savings being depleted. Interestingly, all other medical expenses that we has on 15 October 2021 that was submitted timeously to Bankmed was paid. The Erasmuskloof Pharmacy team claim that after knowing that Bankmed indicated depleted savings, they "eventually gave up" on the account and opened an account in June (now 8 MONTHS following the initial transaction and about 5 MONTHS following Bankmed's decline). They blamed it on Bankmed, stating in writing "I tried to get through to Bankmed a few times but that is quite an impossible task." But, for reasons unknown to them, they only decided to actually notify me of the outstanding amount and send that account to me on 27 October 2022, more than a year later. SARS stipulates that, for very obvious reasons, invoices must be issued within 4 months. The invoice was not even issued to me 4 months after Bankmed declined it. I have corresponded with Benita Adams, Thealette Vorster and Valencia Green back and forth for a while now and other than sloppy excuses for the mismanagement of this account by them, we are getting nowhere. I have asked twice now that the matter is escalated within Mediclinic and this has not been done. I consider this invoice being invalid due to it being issued for so long and want to conclude the matter. Although I appreciate that the team responded, the communication that I have received to date is pathetic and is going around in circles. Imagine all my medical accounts are sent 1 year later when the suppliers feel like issuing it - chaotic and unprofessional service to say the least.