I want my money back!

On the 31st of August I made a purchase with my bank card and they deductet twice. I went back again and they told me to bring a bank statement, leave my number and their head office will contact me. I did all of that but im still wainting. Went back again to ask for head office number and they gave me one for whatsapp, said they dont have head offices number. This is Hungry Lion in Port Elizabeth, Govan Mbeki next to Shopright. Im so dissapointed by this because even getting the bank statement cost me money, I still havent received the money that Hungry Lion took from me. What should I do to get my money back?