Facebook lead generation expert for car dealership

We have a client that is a local car dealership who sells used cars and wants to sell 10 more cars per month. He can offer: 1 free tank of petrol when buying a car from him. 2 Finance check and approved within a day 3 free test drive
The job is to use Facebook advertising to get qualified call leads for him
The work is for 2 weeks and if you deliver great results and we will hire you for our other clients