I don't think Ebay would pull your listings because of an Auctiva link.
I pulled up some of your completed listings (if it is indeed you, your user name is the same) and found a link to your dot com site...
""or Visit my STORE at
THIS is what is not allowed - no links to external sites, where the buyer may purchase there rather than on Ebay.
Since I can't see the listings that are gone, I'm guessing that if you had this link in them, that's the reason they were pulled.
Beautiful flowers, BTW.