brand new landwind broken out of box

i bought a landwind brand new(out of the box) but the car had problems i took it back they "FIXED" it but the problems was still there and it is not fixed this went on for about 2 years i ask for a refund and and they said they are willing to buy back the car for less that half of the price which is not acceptable i tried to speak to MR. Wang to find out why only so little but the said "I Don't have time for this" and through the phone down in my ear