Report that combines Accounts & Products and Services Purchased

I want to create a report that I can run for multiple products/accounts.

We have about 30 products.

Say I want to find all the accounts associated with one of those products.

I want to create a Report that finds any account with 1 product, so I can then specifically target that group for campaign emails on that specific target.

When I currently try to run a report using the Products field, choosing Accounts and then Purchases, my report comes up as blank. However I know that I have correctly set up my quotes etc to reflect a company purchasing a product, as when I go to all my accounts, I can see their various “Products and Services Purchased”.

Now to find out how to get the report to actually populate the data…

Any help would be great!