Market manipulation

I purchased a H6C Haval in 2021 and I knew that I would lose some money when I sell it again because the Haval brand is not as strong in the market as the known brands. But I realized with a shock that I will be losing R 80 000 after only three years and that is because Haval have dumped a lot of hail damaged cars in the used market and that caused my vehicle to be worth almost R 100 000 below the trade value. The Haval dealerships don't even want to purchase the vehicle directly from me because of the stock in the market. Even when I want to trade the vehicle in, I still loose R 80 000. Is this not market manipulation because they are not dropping the new vehicle prices to compensate for the loses that the loyal customers are having to deal with. So, they are smiling all the way.