Replacing eBook on Amazon

Advice, please. Trying to do a test run, I uploaded by eBook on my new KDP account, then tried to replace it with another version and the new version is stuck there, unpublished with no “publish” button. In a few days I’ll have my final, totally ready eBook and want to upload it. What should I do? How do I get rid of the two versions I don’t want out there. I know, I know. I’ve made a mess. HELP!! I’ll soon upload my paperback and hardback too — all for a June 2 launch date but I want things cleaned up and ready before then.