Poor communication and no refund

My wife purchased a dress at their Somerset West store on or around 26 July 2023. She is disabled (multiple sclerosis) and cannot try on items in store (she uses a mobility device) - and advised clerk at the time of purchase. I returned the dress to the store a few days later (8 August 2023) with labels and all only to be told that KH do not do refunds and I was given a gift card to the value of the dress. We were not advised of this policy at the time of purchase. Had we known, we would not made the purchase. I do not agree with the policy, and was not informed of it prior to purchase and, especially in this case, do not think it fair. Staff need to inform customers of their policies before making a purchase. I purchased a leather jacket online on or around the same date - thank heavens it fit. However, given my experience, I will not be purchasing from them again.