COULDN'T GET REFUND FROM MR PRICE WITHOUT A RECEIPT

I went to Mr Price at carlswald. I went there to return an item I purchased a few months ago and I had misplaced my receipt for the item. When I got there I explained to the manager that the item I bought was falling apart, I also explained that I misplaced my receipt for the item, but she showed attitude towards me I was truly disappointed on how I was treated at the store. So I left my item there because she was rude towards me.