BAD CUSTOMER SERVICE

Today i went to purchase earphones at Pep in Randburg...Ntswaki (cashier - 11-01-37, 158134 ) processes the sale but in the middle of the transaction she's like cause you using FNB it will decline as they had an issue with FNB cards. Why let me wait, whilst you know that certain bank cards are getting declined. Then she has a nerve to say that i must call FNB so they reverse the transaction, if it doesn't get reversed automatically. She saw my bank card, why didn't she ask before processing the transaction,, make me aware of the technical glitches....now you ask if i have cash, like what customer service is that....PUT A SIGN BEFORE HAND OR MAKE CLIENTS AWARE.