Double charged for online order

I placed an order online on 8 May 2020 and paid for it using my debit card. I received a notification confirming payment went off . The order was delivered 19 May 2020. On the 20 may Woolworths processed another payment on my bank account , charging me again for the same order which was already. Went to request them to reverse this payment at Woolworths west street and I was to email their online department as they are not able to contact them at store, don’t know how that is possible. I sent an email to their queries department, just got a response that my matter has been referred to relevant department. How can it take them soo long to refund money that was **********ly deducted . Is it even fair to have to wait for your money to be refunded, should nt this be an immediate transaction. Very annoyed with Woolworths