Digital marketing and social media management

I am looking for someone to virtually carry out digital marketing and social media management for my business. It is a small startup offering accounting and business consulting services in Zambia.
Specific requirements include:
1. Improve website appearance and SEO
2. Facebook advertising and content creation
3. Twitter advertising and content creation
4. Linkedin advertising and content creation
5. Linking of website and all social media pages
6. Assist in overall marketing strategy formulation and implementation