You can't delete the post, but you can edit the post and remove them and add photos that you own.
They are not my rules, but rather rules for all of Hive.
Read the section about plagiarism.
https://ecency.com/hivewatchers/@dickturpin/the-missing-hive-watchers-faq
How do I edit it I have but to no avail
Log in to Ecency.com , find your post, click the 3dot menu in the top right corner, choose edit, make the changes, then click update at the bottom right.
I can't help much using the other front ends. I only use Ecency.