1) First of all, get rid of the store. The store subscription is not
worth the money when you have currently 21 actual listings. 2) Ebay
gives you 50 FREE insertion every month on an account as a "basic"
seller (no store subscription), use those ones...
oh BTW, please report this buyer to eBay and THEN block her completely.
If you wish to go the extra length, go to her eBay ID and check where
she buys stuff on eBay and also alert other eBay sellers as well, so
they also will be cautious dealing with...