Inefficient and Useless

I purchased some items from your store on Sun 9 Jun. Upon payment using my husband's card the screen showed an error twice so I settled the difference using cash. About 2 hours after I got home I received an SMS showing that the account was also debited. I went to the store and explained this to the manager together with my till slip and cellphone banking showing that the debit went through and was told they can't do anything without a bank statement. Which means I must now be inconvenieced again and go wait at the bank to get a physical statement despite having the evidence with me?? I was told that your systems won't reflect transactions that took place (LMAO right?) and with that I don't have my refund. This kind of service won't get you nowhere and I'm more than happy to take my business elswhere. FYI I'm an Influencer in Online Marketing and this is going straight onto all my social media pages.