Standard bank double debits without telling you .

Double debit on current account for credit card payment. Had to phone and send emails to get response. No apology and consultant was unable to explain meaning of abbreviations on statement. Blamed their IT department. I am wondering how many have not realized the double debits on their statements. Revered eventually but no interest credited for the period they kept the extra cash. Spent over 30 minutes on cell phone with consultant. Please check and report for clients to benefit.