Looking for a call-center agency/team

We are a digital marketing company. Looking for a professional sales representative services Provider. We have bunch of website and want good position on salesץ We want a call center agency, very professional, with experience in the past and good skills in communication. When you will be contacted please tell me about your experience in work, tell me how many people you have in your agency/team, tell me when you can start to work, what is your experience, and your english level.