As a little PSA word of warning, it seems EA / Respawn have begun another little ban wave or they've tweaked something in their anti-cheat that Linux / Steam Deck players are getting caught in for Apex Legends.
The General Data Protection Regulation (GDPR) gives individuals the right to ask for their data to be deleted and organisations do have an obligation to do so, except in the following cases:
the personal data your company/organisation holds is needed to exercise the right of freedom of expression;
there is a legal obligation to keep that data;
for reasons of public interest (for example public health, scientific, statistical or historical research purposes).
How long ago did you contact them?
If they haven't done what you asked within 30 days*, you should report it to your country's data protection agency. I also recommend that you inform EA that you are willing to do that, if they are not cooperating.
*In some cases they can extend the deadline a bit, but in general it's 30 days.