H & M are croaks

I have made a purchase at H & M East Rand Mall. They told me that the transaction was decline and I was surprised because I knew that I have money on my account. And my permanent card purchase limit is more than what I was purchasing. They told me to make the payment again. I refused because on my bank App the money was gone. They told me is going to be reversed after few hours. Two days after I checked my Bank App still the money was gone. I went to my bank and they phone the so called Manager Allan and told her that my money is gone to H&M. That Allan refused to give me the items claiming that H&M is not paid, I need to pay again. H&M has their items and my money. I just donate to H&M with my money because I don't have items. Their staff are croaks and I wont rest until I have my money. I will never set my foot again at H&M