@Fartoostrong does your current lease car suit your needs perfectly now ? if it does why not go back to the grants team and tell them that you would prefer to keep your current car and extend for another 2 years,others on this forum have done that exact thing.
Dont be tempted to put £3,000 on a credit card unless it is on a card with a substantial interest free term,24 month or longer,and you can afford the monthly repayments.