RSS is a hosting company, and has no influence on whether or not iTunes will accept your RSS feed.  iTunes generally accepts feeds within 24 hours to 2 ...

Before you actually submit your feed to iTunes, please check your podcast to ensure that you have followed all requirements needed. 1. Change your Cover...

1. Go to podcastsconnect.apple.com 2. Select "My Podcasts" 3. Select the show you want to remove 4. Select "Delete Podcast"

It can typically take up to 24 hours for iTunes to update your podcast.