Double Charge on Credit Card Correction Letter

1- I [name] have an account in [name of bank] in the [name] branch. My account number is [number].  For the last [number] years I have been banking with you. Recently I got a credit card and since then, I have been using it pretty frequently without facing any problems. However, something very troubling has happened which I want to bring to your attention. I used my credit card for...