Sales Leader

We want sales lead for managing company relations with existing customer + adding new customers to company insuring all the customer should stay with the company as well as insuring there purchases . and getting alive old customers and identifiing there curies. sorting out there issues and sending them messages for informing them about new materials. + giving them information about stock shortage. maintaining there data and identifing not visited customer. reaching them with the help of phone and insuring them to purchase from company. atleast 85% customer have to retain by him. and yes he should know how to use google sheet and use formula for data analysis.