Poor service from Blue flame gas

On the 5 March 2022 I went to Blue Flame Gas to purchase a two plate gas stove. The sales lady was amazing but when I got to the till to pay, the cashier removed my credit card too quickly from the speedpoint. I received a declined slip and had to swipe my card again. When I got home I saw that the transaction was reserved twice. I then phoned the store and spoke to the manager Linda. She told me to go to my bank and did not even apologize for her staff member's mistake. I told her I was a first time client and she just brushed it off and insisted I sort it out with my bank. On the 7th both transactions were successful and I phoned Linda again. She was more irritated with me phoning the whole time and I was told the accounts lady will only be in on Tuesday and would be contacted regarding their bank statement. It is 17:33 and I have not received any feedback. I also work in retail and if a mistake was made we apologize and try to assist our clients, clearly Blue Flame Gas does not have the same customer service ethics. I will never purchase anything at their store again because of this experience or refer anyone to their store. Worst service from a manager I have experienced.