remove feedback from eCommerce website

Hi, i sell some products in ecommerce websites,i will get some bad feedbacks due to late delivery or missing item and some other reason i want to hire people from uk,us,canada,germany,french,italian,spanish,japanese i will provide customer phone number and email,calling customer and convince customer to remove feedback,we also refund money to customer who removed i need some who good at speak individual languages,i will hire one person from one country i will pay depend upon number of feedbacks removed Thanks