Disgusting service

I had a horrible experience at pick n pay hyper greenstone i had a giftcard that i was saving to purchase at pick n pay i went to the cashier to check my balance before i started to select the items my balance was R7000 and that was correct after 2 hours of shopping went to the till to cash up everything the cashier swiped the card and said there was a problem with the card afterwards they told me the money is gone i asked them repeatedly how did the 7000 dissapear ,the lady zanele said she will call the manager Alice she told me that they cannot do anything another manager came an told me he does not have my money and i must "escalate" the matter and theres nothing he can do an why must he resolve the issue.theres 0 balance on the card The name of the manager PHUMEZO HOD FOOD so i left with no groceries and i dont know where my money is gone i would never shop again at pick n pay ..there where people looking at me like im some kind of ******** because they refused to help me and take responsibility for the money that the cashier already swiped out the gift card..i left the store and called customer care on *** where i then spoke to a lady that went onto the system and saw that the 7000 was already swiped at the till just after 4 pm...so my point is why couldnt anyone one of those 3 people help me by calling up their customer care to rectify the issue .they rushed us out of the store with so much of attitude beacuse it was nearly closing time. Pnp hyper greenstone provides the worst customer service and they are ***********...