Review No receipt issued. cashier unattended

Hi! Just this morning around 8 to 8:10 I purchased presto cream at mini stop Annapolis. There is no price tag on the product rack. Before me there is a guy paying, then he left. I thought the cashier will just get something but it took a while and when I look what she is doing shes holding a phone so I call her attention "cashier please" twice. She scanned the item and give me the change. When I ask her for a receipt it looks like she is wondering what I'm asking for. then I said RESIBO. And she said "WALA PO NAUBUSAN PO NG PAPEL". I don't know if she gave me the right change. Not issuing a receipt is a BIR violation.