Can't publish any more links/ Remove links permanently in XD

Hi there 

I've been using Xd on a starter plan and I am using the link publishing function quite often for different versions of a document. Now I just got the notice, that the "maximum number of published links is reached" and I am not able to publish links anymore. Since I would like to continue on the starter plan, I was wondering whether it is possible to delete previously shared links, since I dont need them anymore. 

Anyhow, I deleted some documents "permanently", but I still can't share links. 

I have already tried this: https://helpx.adobe.com/at/creative-cloud/help/remove-shared-links.html#:~:text=Rufen%20Sie%20die%20Creative%20Cloud,entfernen%2C%20um%20ihn%20zu%20deaktivieren however, there is not the option in my account to click on "publish" and then delete link. 

Could you please let me know, whether this issue can be resolved? 

Many thanks in advance.