Once bids are placed, a seller is not allowed to change anything about the auction, including number of days. Can only update such as add pictures or more description...don't worry...you'll probably get it :)
You're welcome...whenever you wish a seller to change something,..if there are no bids on the auction, you don't bid either ...wiat for a response from the seller, first, then you can bid once things are changed if a seller is willing to do so. :)