Pathetic service from Pick n Pay costs time&money

I wish to make a complaint against Pick n Pay Randpark Ridge. On Sunday I made a purchase at Pick n Pay Randpark Ridge, however as I paid with my credit card and typed in my pin I was informed by the cashier that my payment was cancelled and that I needed to pay again. I then paid for exactly the same purchase again. I noticed immediately that there was no reversal of my previously paid amount and went to find the store manageress Evolia. I was told by her that this happens sometime and that I must wait 48 hours to see if the amount would be refunded and that I must bring my slip when I returned as proof in case nothing happened. I then waited for over the required time period and went back to the store today. Upon informing the same store manageress I was handed over to another woman in a red coat/jacket (the main manageress I suspect)and she told me I need to get a back statement in order to prove that the amount was not yet refunded. I then went to the FNB branch and obtained the necessary bank statement. Upon returning to the store the woman in the red coat/jacket was nowhere to be found. So I was taken to another lady Salome who assisted me.I am seriously not impressed at all!