I want my money back

On the 4th February I bought products which amount to R544.97 using my fnb cheque card. I put my pin in and proof of purchase states exact the same amount but my statement says I used R5449.97. I went to the shop on 6th and I was told make copies of my ID, bank card, bank statement and proof of purchase which I handed over so I can get my money back. I've visited the shop and called to hear when will I get my money back. I'm writing this review I'm on my 15th day and I haven't got a notification when will I get my money back. Ive wasted so much airtime and petrol trying to reach out. Studio 88 soshanguve crossing shame on you.