Poor service

I want to know what the return policy at edgars stores because on Sunday I went to return items at Clearwater edgars that I bought through payjustnow I spend close to ab honour moving from one til to another after they told me they are offline their till are not doing payjustnow refunds. They will call me to bring the itema back when they are back online I then decided to go and see if there's something I will like on the floor so that I can do an exchange. I found a pair of shoes and I had to pay 80 difference. But when I got home I discover that the shoes don't really look nice on my feet and I took them back today at edgars cresta and edgsrs cresta saud they can't give me the money because the skip for the items I had exchange I don't have. I told her I bought the items through payjustnow and I will check the slip on the app but she refused and said she will give me a voucher. Edgars must tell payjustnow that they can't assist us rather than this poor service we are currently receiving. Am so annoyed with both Clearwater edgars and cresta.