Searching on 'Rick's Martini Bar' produces only one result, a different podcast called 'ricksmartinibar' which has only one episode from 2011 (plus a Podbean placeholder). It has a similar image to the one in your feed (which will not appear because it's too small).
It looks as if your podcast has been removed from the Store. The undersized image will result in attempts to submit the feed being rejected, but I wouldn't have thought that it would have caused an existing feed to be removed.
I haven't listened to any of your episodes. Do they contain any strong or sexual language? As you have all your 'itunes:explicit' tags set to 'no', and swearing or sexual language will get you removed once discovered. There is no technical reason I can see why the feed should have been removed.
If you want to submit it again you will have to change the title slightly to get round the bug which is telling you it's already been submitted. You can change the title back once accepted. Before resubmitting you must change your 'itunes:image' image to one which is 1400 x 1400 px and less than 500kB; and if you have any swearing you must change the explicit tags to 'yes'.