Ackermans review: exchange without slip 1

I bought clothes for my newborn baby in December and unfortunately I misplaced the slip however I was able to find proof that I paid with my card, the 2nd slip that normally comes out once you have paid by card. On the back of that slip it says you can exchange clothes without the slip but Ackermans Bayside Mall refused to do the exchange. So why does your slip say you can exchange if they won't allow it? That is false information provided to the customers. I'm not asking for refunds but I just want to change the size. The store keeps copies of slips so why is it a big issue that I don't have the slip?