Hyundai Delayed My Car Delivery After Full Payment Despite Promising It Immediately

I recently bought a brand-new Hyundai car, and I was told it would be delivered right away after I paid for it in full. This made me so sure that I sold my own car and even paid in some gold to get the money. But even though the payment was made, the car was not brought as planned. At the cost of misleading customers like me, it's become clear to me that they might be using the money for other things, like making interest. I feel let down by Hyundai, a brand I thought I could trust, after this whole thing. I feel bad about choosing Hyundai, and I hope they take responsibility and send my car as soon as possible.