You are asking for a specific person or outsourcing company that will help you in your goal?
Although Call Centers are rising from the last 10 years and on a spree for the last 3-4 years, there a lot of managers with such experience. I've met a lot of them that I would highly recommend in the U.S.
One is the outbound call center, RRC at https://www.remotecallcenter.net. You can reach to them on 1-404-990-4639 and tell them my name. You will get a one day trial. This is on me. You will get advice and all the needed help.
Let me know if you find any info out. I'm interested myself. I may be able to help one way or another.