I am really sorry but Ad Agency is not working as described.
The design looks broken
Banner can not have different prices. You will have to buy a package for reach banner zone if the prize differs.
If you upload a banner all previous fields will get lost (Title, Description, Target URL)
After uploading a banner the customer can not proceed to the next page. So it does not work at all (from the client side).
Stats are not counting. So impressions do not work.
Looks like this is not ready yet. Please refund. I might come back later.
Thank you.