Pathetic service

Today just before 6pm my sister and I visited Woolworths Liberty Promenade in Mitchell's Plain. At the till point airtime was purchased and after I paid for my goods. The cashier handed my receipt which I immediately placed in my pursed. Few minutes later when I got home we I realized that the airtime was not with the receipt. My sister called the store as the airtime was purchased for her, the store associate acknowledged that the airtime was left at the store and advised that it could only be collected tomorrow as the store is closed or closing soon. My sister advised that she is working and cannot collect it and neither can I as I'm leaving for the Easter weekend and also we do not reside in Mitchells Plain and only visited family in the area. The store associate said she cannot give the voucher pin over the phone and that it need to be collected even though it's highly impossible, later on the call it was also said that it's locked in the safe and she will see what she can do tomorrow. This is extremely frustrating as the airtime was paid for and the same way my receipt was given the airtime supposed to be given as well. When one forget to pay it's a huge problem but when the cashier forget to give the goods it's now the customers fault. I also find it very strange that last year the very same incident happened at Woolworths V&A Waterfront and there was absolutely no problem the staff assisted telephonicly and even apologized which we all make mistakes and it's fine. I trust this matter will be resolved if Woolworths really wants to make a difference.