Yonela adonissi sorted out my problem in 5 minutes which took other 3 staff members 3 months and could not still not do it

Yonela adonissi sorted out my problem in 5 minutes which took other 3 staff members 3 months and could not still not do it. She needs to be in Customer service management and controll all queries and be able to let go of the dead wood employees that give bad service.