Need a very good freelancer/group to help grow, manage our company's social media

We need a very good freelancer/group to help grow and manage our company's social media. This includes media buying and suggesting all the possible ways to get a conversion. We are in the business of rideshare. Please be experienced in this field and be ready to show/demonstrate how you've been able to get translate the conversion to helping the bottom line which is the profit. I will provide more details