Can't add a listing – "Submission Limit Reached"

Whenever I am logged in and try to add a listing by going to:
https://yogaallover.com/add-listing
I am redirected to the Dashboard with the message:
“Submission Limit Reached
You have reached your membership submission limit. Please delete an existing listing or upgrade your membership.”
But no link to being able to upgrade the package. So there seems to be no way for me to add a listing.

Can anyone help?