Bad service Mr P Home Centurion Lifestyle

I bought 1 pack of curtains extra at MrP Home Centurion Lifestyle. I lost the slip. I tried to return it but the store told me they will give me a voucher. Which I did not accept. I want my refund in cash. The cashier did not send the slip to my email also whereas all MrP shops now have. This is the first time I have a bad experience at MrP. Where I come from, Durban, Hillcrest MrP was the best in terms of service. I'm not happy with the service received here. Maybe its a Gauteng problem! I have this transaction on my card but don't have the receipt. I cant be forced to by things I don't need. I spent over R4000 that day already. They made me feel like I stole the merchandise. Saying they don't know if I paid for it. Hence they don't give cash. For me cash is same as voucher cause the merchandize can still be sold since its still in its full packaging. Customer service email response was worse because they threw some law into my face about why they cannot give me a cash refund. They asked for transaction on my card, which I sent. To date, no feedback. MrP wants to decide on my money, which refund they want to give me. Its my money! Its not acceptable.