debited on my bank account

I went to buy 300 flash airtime at acardia mall in Pretoria n aftr I typed in my pin number de cashier told me I cnt buy flash wit a debit, den I left the store on my way I c de sms fat says I purchased at pep. I went to capitec t gt de statement, it stil appears on my statement. So dey I'm so furious I want my money bak . Hw de hel on earth wud I pay for sumting I ddnt get. Dats a *****. I k nw de cashier Dr it on purpose . Dats hw dey ***** money frm customers.<br> I wil really appreciate if dis family of mine cud assists in dis matter