Wow what pathetic customer service

My dad bought a emergency survival kit for my hike I did Sunday. Not knowing I got me the exact same product he heard me talking about it and decided to buy it for me. He purchased it with his VISA CHEQUE CARD not a credit card ad he does not use credit cards. So I decided to go and return it and buy something else for me. So I went to the Canal walk store inside the mall. I went straight to the till told the gentleman that my dad bought it with his CHEQUE CARD not a credit card. The card transactions say Visa as it's a Visa Cheque card. The more I tell the sales person it's bought on a cash card. The reason I don't have the card with me is that my dad will know that I returned it, then it would hurt his feelings. This guy was so rude he said there is nothing he can do I can do what ever I liked he would not give me the cash. I told him he could see my ID and I would even bring the card with Satur day to show him. He wanted to hear nothing I never felt so humiliated as there was customers looking at me like I was a ********. How can one be treated so bad and yet I always buy at the store and believe in the good prices. I want this sorted I want the money or I will take this further