Edit: Holydarkness : You gave an example of a "burned paper," but that analogy doesn't even match the situation. Duckdice has repeatedly changed its story.
But if you take a look at the screenshot : https://imgur.com/a/ivzSNe8 , it clearly contradicts your current comment. In that screenshot, the Duckdice.io representative stated that they received a response from their team confirming that my account was deleted upon my request. Earlier, you mentioned that there is no data showing my request for account deletion. So, how is it possible that the Duckdice representative claimed they received a response from their team confirming that my account was deleted upon my request? This seems contradictory.
To the point, If Duckdice.io truly deleted everything, there wouldn’t be any data to check.
I think I've mentioned it on a very earlier discussion we had. Something like kirito can't find your username on their database, thus inquiring you for a proof that you indeed had an account [that request of email showing username] and upon provided, he gave it to the team who handled database and they told him "if the player had an account and now no longer exist in database and can't be found, then they've must be asking for account deletion" or something like that. That's the imaginary scenario I had in mind, of course.
Alternatively, I probably stand corrected. there was an entry, a simple entry that they need to keep in order to be compliant to certain regulation, yet still stick with GDPR's data protection, something like a short line "sezmisenk41 - account removal requested" that's inaccessible by a simple search from whicever division kirito is working and only accessible to the division who confirmed to him. Once he inquired that the username was indeed a DuckDice player at a point [with your screenshot as proof], the department look into their database and pull that restricted record.
I personally lean toward the ealier narrative than the latter, it seems more logical.
If you insist though, as I mentioned before, the only way to get out of this paradox and make sense of it is to provide a logic out of those illogical things. So, if you don't mind, perhaps you can help us understand by explaining why do you think [according to your logic] they lied about account removal and database erasure while the very existence of the database actually works in their favor?