MANAGER DISCLOSED MY PURCHASES WITHOUT MY PERMISSION

Hi i was at ackermans phumula center to make a return they told me if i don't have a receipt i get a gift card ok i took the gift card and later that day i made purchases with it then the next day someone came in with the same card to try make purchases and asked the manager Andile to disclose what i purchased with the card on the previous day and the manager told her exactly what i purchased withoutmy permission, what i purchased at the shop should be private not public knowledge because if every purchase will be disclosed I'll have to cancel my accounts and go somewhere else.