NO REFUND LIES

I did my shopping at Power fashion factory for the Easter holidays, X2 tops said size Large, and i didn't have time to try them, So when i got home they obviously didn't fit. A week later when i went back to the shop for either Refund, Credit on a Lay buy or anything really, The same sales person i found said no refunds or exchange, and then called his manager to have a private discussion about me where she then shook her head and said no refund. the store does not have that policy, How come this two including the manager of Maake Plaza said i could have a refund or exchange. For my friend to go and ask a different sales person the next day and they said YES! they do refund.