Star motor problem

Hello everyone

I got a problem of car capsized, my car it was dutsan go. I went to Nissan dealership and I got the salesman I told the salesman the whole story about the car. The salesman help me with the claim, And insurance paid the claim. The salesman set to me, they have a combo special which means two cars with one finance each car I can pay 1700. So I took the deal because of a combo. Unfortunately it's a one car at the end, and that car traveled 140000kM (ODO) and now the problem I'm paying 3045 month to my finance there's no combo. So I'm worried I need help. The problem I paid only one month the car starts with overheating I fixed the radiator car stopped overheating. Before period of 3 months car stopped in the middle of the road. realise that when I did on and off pump is not pushing the petrol maybe the problem it's a pump I called the Nissan. Nissan send breakdown and took the car. Now its been 3 months they took the car, no progress. So my worry is I said to the salesman that I don't want that old car anymore, And there is no combo here it's a lie.