Dishonest service by Hyundai Hillcrest

The sales experience was good. They matched and even beat prices.. But 2 weeks later and they still have not refunded me my deposit which I paid to hold the deal. I feel like I'm begging them for my money back. The sales person keeps saying he will sort but still nothing. They have also failed to settle my trade in vehicle so now I am left with 2 vehicles to pay for. I am being asked for invoices for the trade in vehicle from when I initially purchased it. They have the settlement balance and now they seem to be buying time and refusing to settle my trade in. It's sad that their after sales service is quite pathetic. I initially thought they were a good and honest company but now I doubt their integrity. It seems I have been fooled. I will be reporting them to MIOSA and NCC and I will be liaising with Nedbank to cancel the deal since I am within the 14 day period.. It's not nice at all.. I'm really dissatisfied..