Pathcare accounts have no idea what they are doing

My wife went to path care sometime ago. They advised there was an amount outstanding which I paid on the 24 June 2022. I then sent the POP to the accounts department as requested and had email correspondence between us confirming all is in order. Yesterday 7th March i get and sms saying there will be a summons issued for outstanding payment with some collection company Muller Terblanche and Beyers. They accused me of not paying and after showing it they said of sorry it was not allocated. WTAF is wrong with Pathcare that they cannot simply manage their accounts. If there is so much as any type of blacklisting or anything I will see Pathcare in court. Bunch of bullies.