I'm keeping the talk brief.

I happen to manage a company office in Kano state. An advertising agency precisely. Since I came, I only sold one of the billboards. Trust me when I say I'm having sleepless night concerning the lack of sales.
My employers are currently aiming on my neck feeling I'm not performing well. I have been to companies, placed calls,submitted proposals but still yet.

I need tips, business advice, suggestions about how to sell these billboards. I'm willing to learn. Help ASAP!