Poor service delivery from Management Team

I went into the Clearwater store at about 18:15 yesterday to exchange items purchased on 27.12.2015. I had the incorrect receipt, but had the stub that was issued when purchasing on my store card. I was exchanging the 1 item and had another item of higher value. She called a Supervisor who assisted with the transaction, my request was to return the 1 item to my store card and take the 2nd item . Pretty straight forward, i thought. The assistant put the \refund"into a Trenery gift card. I confirmed my initial request"