User Activity

on my invoice I am charged a final value fee on postage. With that fee I lose money on postage. It's not fair to over charge the buyer, but paying eBay a fee for me charging postage makes me lose money.
I opened an ebay store, but couldn"t work out how to use it. I emailed customer service but got absoloutly no reply. So I closed the store. I still have to pay for the month. Can I re open it, as I think I understand how to use it a bit better now.