Refusal to refund a cancelled order

<p>I ordered goods from Makro via their online shopping portal. I have since had to cancel my order. </p> <p>I'm now experiencing problems on getting a refund from Makro. I paid for my order on 23 May 2017 using Makro's secure payment system. The payment was acknowledged by Makro on 24 May 2017. Makro is now demanding proof of that payment. I've been to my bank and I can't get proof of that payment because it wasn't made via my bank. </p> <p> </p> <p>I need this sorted out. This is the order number MAK360876. </p>