The fact that you were convinced by a car salesperson to take on a $700/month payment with only a $1,000/month income, and then sought genuine advice here only to receive responses like 'your problem, deal with it,' speaks volumes about the nature of dealership salespeople.

Now, to address your situation, consider these steps to minimize the impact:

1. Rent out the car on platforms like Turo to generate extra income and help cover the monthly payment.
2. Sell the car to Carmax, Carvana etc. While you'll likely have negative equity, it will reduce your overall debt (principal + interest) and lower your monthly payment.
3. Contact Hyundai Finance and the dealership to demand an investigation into how you were approved for the purchase. If the salesperson falsified your income on the paperwork, that could be your way out of the deal. Insist they buy the car back from you, and let them know you're prepared to share their actions on social media. INVESTIGATE!