Expert Marketing for a targeting participants for a Art contest , Instagram and Ads manager Expert for all Artists in India

we are organizing an Art contest for all Indian Artists and require Marketing Expert/Company to run a perfect campaign for us in order to target maximum Artists that are likely to take part.... Posters for ad are ready with us and also there are our competitors of us who are already running similar promotion that we want to chase.
Someone with very good Instagram marketing experience/Team is preferable.