Refused refund

My husband and I bought boots for R800 at Truworths Grove Mall, Lynwood on the 23rd of Jun 2023, on the 30th of Jun, I was at the store, after wearing the boot twice only, I realized the heel is detached, it looked like it was put together using a cheap glue. I had lost the proof of purchase and my husband who paid had already left for East London, I showed them the transaction history he sent to me, initially they said they can't help me because I don't have the original slip ( by the way I have gotten a refund in other stores without a proof of purchase because they have proper systems in place to prove that the purchase was made), after my husband spoke to the manager over the phone and threatened to take this up with head office, suddenly there was a way to track the purchase using his card number and they reprinted the slip, now I was told that I cannot get a refund because according to the policy, a refund cannot be processed on the reprinted slip, after questioning that I was also told that my husband paid by credit card therefore they can't give me cash. First of all, the purchase was not made by Credit card, my husband sent be photos of the card used because the card is with him. The slips say credit and that is definitely a system error on your side, but the manager was adamant we used a credit card. Secondly, why on earth would your pathetic policy apply in a case like this, I am forced to return the shoe because of poor quality not because of size or suddenly don't like it. It is humanly possible to lose a slip, but I cannot be forced to buy another shoe at Truworths, now that would be stupid of me considering that you boot hardly lasted a week! I don't want a voucher; I want my money back so I can buy a boot elsewhere! Your policy does not benefit the customer, the purchase was proven, your quality is ****, what could be so difficult to give me my money back?