The Cashier will be arrested for printing a duplicate of the reciept that i have lost and want to return my phone that is faulty.

My sister bought a phone at Ackermans Lephalale in January through a layby and the phone has a fault. When she return the phone which apparently has a factory fault from the supplier and when she return it without a receipt she was told that she cannot be provided with a receipt since a reprint of the receipt can get a printer of the receipt to be arrested which same is disputed and is against the consumer protection act.(Lie). What happen to treating the customer fairly. For sure the store ha a record of the transaction of my layby and that is why they are required by the consumer protection act to keep records of such transaction. She have begged and kneel down for assistance for the cashier to assist by reprinting the receipt in order for her to prove that she bought the phone with them. She would like to be assisted and not be threatened that the employees would be arrested if they try to return the goods without the receipt hence the consumer protection act was enacted. I wonder which crime would that person have committed and on what bases would that person would they be arrested. Demand answers and assistance.