Poor Customer Service - Consumer Complaint for Clicks Store - Head Office

I purchased an item valued ar R550 on the 27/10/2020 at the Pavillion Store. I did not retain the slip but had used my clicks clubcard.I returned to the store and explained to the supervisor, providing details so he could pick it up. After waiting 15 minutes he returned, with invoice picked up, but said only a voucher could be given not a refund. I asked what information was on the original receipt that was needed. The response was nothing this is policy. Upon calling customer care i was told the store manager could make a decision based on specific circumstances. He refused to.