Need a facebook Ads expert for Shopify

Hello Freelancers. Hope you are doing well. I have a Shopify store and want someone to run a ad campaign for that. I will only work on commission basis. I want guaranteed results. I am very open to suggestions and Please do not apply if you can not work on commission basis or if you are not an expert in the field or have not prior experience. Looking forward to work with you.
Thanks.