That means you've used 10k credits to translate some products that have not been translated before and you were charged credits for the new content. As I said above, 10k credits will not help you to translate all un-translated products on your site. It helps you to send the translated products (before) to automatic translation and credits won't be used in that case.
Please take a look at this screen record hidden link
The product "Teltis āra pasākumiem 3x4.5m balta" was translated and when you send it to automatic translation again, credits are not used.
For now, you can add more credits to your site and translate products automatically again. But please notice that, for products that are translated before, you won't be charged again.
We can handle one issue per ticket only so I will split your question about Pay As You Go into a new ticket for better handling.
If you see the main issue of this ticket with translated products is resolved, please mark it as Resolved.
Thanks.
This ticket is now closed. If you're a WPML client and need related help, please open a new support ticket.