Deleting my Twitter account and data - Twitter not complying with GDPR

I filed a GDPR deletion request with Twitter a couple of weeks ago. It was quite a challenge to find a way to contact Twitter (for anyone who wants to you can do so via: secure.ethicspoint.com/…/default_reporter.asp) - but I finally succeded. I did not simply wanted to deactivate my account I want all of my data to be deleted...