Poor Customer Experience

I was charged 3 times for goods purchased..When I requested a refund I was asked to provide proof , which I did...I gave them a copy of my receipt and went back to the shop and showed them on my account that the transaction appears 3 times, I was told that they can't do anything without Head office approval. They acknowledged that it was their mistake but we're not helpful in reversing the 2 additional transactions back to my credit card. I left letting them know that this is a very poor customer experience. I will dispute the transactions with my bank and make sure any charges are for the merchants account.