Just to let you know I got an answer from the Canva support:
"Thank you for your patience while waiting for our response.
We are a bit behind in reviewing the submitted images, but the team is working hard to bring everything up to date.
So we hope that the situation will improve soon. We ask you to give us a little more time to resolve the issue.
If you have any other concerns, please feel free to send us a message."
A lot of text with almost no information... typical support nowadays :-)