Charged for delivery of a card after it was stated to be free

So I lost my cheque account card and requested for a replacement on the app. On the app it was stated that I qualify for a free courier and I thought oh great they offer that if maybe it's my first time replacing a card. So I entered all my details and the card was delivered to me at my workplace by a courier company. At first I was only billed R145 for card replacement and i didn't mind because yes i am replacing a card, a few days later i was billed for the delivery of the card an amount of R160. I was shocked to see this and if I knew i would be billed I'd have opted to go collect at the nearest branch but the app stated otherwise. I'd like for the R160 delivery charge to be removed as it was not part of the agreement.