Awful , unprofessional behavior from dischem

I went to dischem pharmacy at retail crossing roodeport which I do at clear water or any dischem that's nearby on a monthly basis .. after handing my medical aid card to the lady at the counter I am informed that I have an outstanding account with dischem I was shocked and notified the lady at the counter that I normally pay at the till points and how it is possible that I have an account because dischem captures the details upfront ... the pharmacist lady then proceeded to hand my details to the another pharmacist who insisted I pay that account which I have no knowledge of and refused to give my meds .. I was not even contacted about the acc which is from Oct 2018 .. the excuse this lady gave me was that it was late and the staff at the till point never processed the payment and I must pay the acc... I find this Soo pathetic and such ******** behavior where I the customer have to pay an account where dischem staff stuffed up and the lady had a darn audacity to tell me that I need to pay this instead of apologising and trying to rectify this ... i feel this is highly unprofessional and ********* behavior from dischem ... I also feel that dischem needs to train the retail pharmacist on customer service ... I never this experience with the clicks pharmacy and will no longer be using dischem ....