Expert in Facebook Advertisement for e-commerce webshop

Hi there, I am looking for an expert in Facebook Advertisement for our e-commerce business.

Our main goals are:
Optimize the costs per Purchase and Pay Per Click
Create great ads creatives to attract new clients. Knows how to manage ad sets and adjust accordingly
Increase the general ROAS
Scale our ads while maintaining a healthy balance between cost & profitability

Please provide case studies/examples of your work

Thanks!