BS debit facility

Bought a dress not knowing that I would have to return it cos when I got home they had bought another for me .Now I'm being told that the store doesn't have the debit card facility for returns but they gladly take money as form of payment from debit cards.I stay in centurion and it doesn't make any financial sense to go to menlyn or mall of africa for a return unless my petrol will be reimbursed