Hi,
We also need database access to delete all AdAgency tables, I tried to update adagency from an old version to the latest version on our test sites and I can not replicate the issue.
You can use this SQL query to delete the database tables:
DROP TABLE jos_ad_agency_advertis
DROP TABLE jos_ad_agency_banners
....
PLEASE make sure that after you delete all these database tables you will lose all ald values, old banners, old campaigns, this delete action is not irreversible.
Please replace "jos" word with your database tables prefix.
Kind Regards,
Alin