To view URL Profiler invoices, you need to find an email with subject line beginning 'Your Order: URL Profiler', which was sent to you when you originally signed up, or any renewal email that we send you (these ones start 'Your Subscription Renewal: URL Profiler').
The email looks like this:
These emails contain two links, the first is for your invoice, and the second one takes you through to a subscription details page.
If you click the top one, you'll be taken to an invoice page which looks like this:
If you are unable to locate any invoices, please email firstname.lastname@example.org for assistance.