Refund still outstanding

Despite cancelling my online order the order was delivered. The courier company who delivered the parcel refused to take the parcel back. I returned the parcel to the Centurion Sportsmanswarehouse branch. On returning the parcel, they were offline and could not refund me. I provided my banking details for a refund. A demanded proof that the parcel was indeed returned as none was offered. Week 3 of liaising with the customer care center and still no refund. Every excuse in the book has been offered but no refund!!!!! Quick to take back their product but giving back the clients money is not a priority