Bad service at Pick n Pay Vaal mall

Went to Pick n Pay Vaal Mall today to withdraw My mom's social grant money today, to my suprise all the tills in store did not have money, I was sent from till to till only to be told that they font have money in their till and I call their customer care the lady I was talking connect me to someone in store then the lady in store told me that if the grant money is finished there is nothing they can do. My point is if the is no grant money why dont the write a notice so that we can not waste time standing in a line to be told that there is no money