Social Media campaign for new product launch

We are launching a new B2C service in our business and would like to run a measured Social Media campaign to promote it.

The platforms we are looking to use are Facebook and Twitter, but would take advice from the successful vendor on which would best suit our needs.

As part of the creative specification we will need professional branded images producing which fit with the exclusive profile of our business. We are looking for at least 3 posts per day on Twitter and one post per day on FB and to align ourselves with a Social Media expert that specialises in rapidly growing followings on both Twitter and Facebook,