Double deductions on online payments

31January I made an online purchase, payment was successfull and order was generated and the purchase amount was debited off my bank account. Today another debit has gone off my bank account for the same purchase made last Sunday. I don't understand why everyone a purchase is made, a double deduct is made several days apart. Order ***. Last year the same thing happened on order ***. Woolworths promised to refund the amount but it never happened and I had to go to my bank to get the amount returned and I got charged cos they said its a Woolworth problem. Im tired of this.