Don't use Woolies Dash App

I placed an order on their Woolies Dash App early in the morning on 2 March to be delivered between 14:00 and 15:00, and then my husband said he'd do the shopping so I went to cancel it at 11:00. However, the App refused to cancel the order, so I emailed their help... An hour later no response.... so I emailed again.... still no reply... then I called the number and the consultant said she'd cancelled it. Well, I didn't receive the order, but it's still active in the app and the payment is still out of my bank account and hasn't been refunded. Never use the Woolies Dash App, it has so many bugs, and the "help" clearly doesn't work (I emailed them a third time and called them a second time on 3 March and I still don't have my money back).