Restarting my Podcast

Your podcast is still in the iTunes Store at All About African Violets by Adrienne "Annie" Rieck on Apple Podcasts

The feed has only one episode, but as it has no playable media it doesn't appear in the Store or when subscribing. (It also has no title.) Normally I can check whether the feed the Store is using matches the one you quote, but it's not working in this case. It probably is. You should be able to add an episode in the normal way: when you've done that and uploaded the feed again you should subscribe to it from the 'Subscribe' button on the Store page and check that the episode appears in iTunes (in the Library/Podcasts section): it may take the Store a couple of days to catch up, possibly more as the feed's been moribund for some time. You can also check the status of your podcast as http://podcastsconnect.apple.com - click on the image for the podcast and it should show as 'Active'.

Your feed still has no 'enclosure' tag containing the URL of your playable media, so won't work in iTunes. Your site has a page for the episode with an embedded player of an MP4 video file, which in itself ought to be OK, but there presumably has to be another step you have to take to get it into the feed. The embedded player itself won't work, you have to provide a properly formatted link to the actual MP4 file.

Yes, that's the URL you need to get into an 'enclosure' tag in the feed with the correct attributes. I'm not in a position to advice on WordPress but they have a Help page at https://en.support.wordpress.com/audio/podcasting/

You should be able to keep you Store page and ratings if you can either modify the existing feed or arrange to transfer the Store to a new feed as described here: http://wilmut.uk/move

In any event your next step would be to approach Blubrry Support who should be able to advise on how to proceed.

Your show's directory listing in Apple Podcasts is working off of this FeedBurner feed URL:

http://feeds.feedburner.com/AllAboutAfricanViolets

If you still have access to this FeedBurner feed, go to the settings for this feed and make sure the current podcast feed being generated by WordPress is set as the FeedBurner feed's source URL. Then, go to the Troubleshootize tab and click the Resync button.