Purchased a vehicle last year to find out this yea...

Purchased a vehicle last year to find out this year i was overcharged they gave us a 2017 Nissan versa payments are way too high $410 monthly it's a standard vehicle and now im behind in payments they wanna reposse it it's gonna go on my credit im stuck without a vehicle badcredit and a loss of 1000 dwn paymemt the vehicle only retailed for 10,000 but they told me it would be 18,000 im so upset and angry I thought going to a real dealership the experience would be better. We were wrong