Advertising Sales (B2B experience) & Virtual Assistant

My business' main need is sales. I have just been too busy to focus on sales & the sales reps I've hired in the US have never panned out. I have a digital advertising company with a particularly unique product and I have launched an online streaming service meant to provide a platform for local businesses to advertise on. I have already produced couple of shows & need to find sponsors. I need aggressive cold callers who know how to create email & call follow ups to complete a sales funnel and close deals! I need a mix of closing small local businesses and someone who can also nurture bigger companies to close the big deals. In between the main responsibilities of sales, I also need help with some other operational things pertaining to website builds and other businesses I am a consultant to.