No respect for customers

I went to purchase at miladys quagga mall and was told they do not have plastics I must buy their bag which costs R4 and its not even big enough for that amount.I told the lady(Lebogang Modisha) I don't have R4 to buy their bag she continued to scan the item and gave it to me as it is and then I asked her am I supposed to carry the item as it is then she said unfortunately there's nothing she can do.I credited the item contacted head office to be answered put on hold for ****** 30min then my call was dropped.Ive been a loyal customer for over 10yrs but was treated like trash by a company who never even had the decency to inform its customers via sms or email about their new system.