Charged me twice for delivered goods

Quick summary<br> Ordered online using my Capitec Debit Card with Mastercard facilities for online purchases.<br> As soon as I placed the order the funds were debited from my account.<br> <br> Then a week later after the goods were delivered, Woolworths debited another amount (40 cents difference)<br> Because it's not an identical amount, the solution to have the amount reversed from the bank failed, they had to do a whole investigation etc etc, I said don't both don't have time for this.<br> <br> So simple solution - Woolworths was paid twice - Woolworths - I don't want my money back, can I get a voucher for the amount you debited extra - please let me know asap.