Falsly accused of theft and traumatised

Picked up monthly meds. Dispensary put meds in basket did not seal the basket and slip stating R0.00 was stapled on packet I was under impression that I did not have to pay and that it was my chronic meds. I took the packet out of basket and put it in my checkers bag, went to till to pay for rest of the stuff I bought. Got home, a David - Security phone me and said I must please come back to store because \there was a problem with my dis-chem card". I did not take it seriously because the card is only there to swipe for points. Later I open packet and saw the slip under the R0 slip for R689. I realise that I had to pay that. I went back sat"