I need help with this issue: Seller contacted me saying issue with cost of purchase and after back and forth with seller, has requested I cancel order. Went to cancel order but Ebay says I can't because order has been shipped. Last message from seller suggests item has not been shipped and wants me to cancel the order still. Please help me to resolve issue. I no longer want to purchase item because of seller's back and forth communications and requests full refund. Thank you..............