Double billed for R3296 purchase and no resolution

On Friday 11 May I purchased linen at loads of living Canal Walk I used my card which has my debit and credit card linked on one card Purchase was paid using my debit card for R3296 - 11 May The next day R3296 was deducted from my credit card - 12 May I went to the store yesterday and after 20 minutes the store clerks managed to locate the Area Manager Maryna Britz on telephone who is based in Kimberley. She did not apologize and told me she cannot do anything till she has spoken to accounts department “as the company has many departments for different things” I asked how did they manage to deduct from my credit card without my pin - she rep**** that she does not know as she was not working at the store at the time I asked when I will get my money back - she does not know , maybe two days, she has to speak to the correct department She said I will hear from her tomorrow by 10am, today I received a call from her, where she still did not apolgise and sounded irritated that she had to deal with me. I sent her bank statements which she said the relevant department needs to see. Currently I feel like I have done something wrong and not visa versa, I am being treated with contempt and am out of pocket by R3296 and no resolution nor an apology. Please can this be sorted out and stop treating me like irritation...........