Stop downloading Lion from the App store
Purchasing is like being pregnant, but a little more black and white. It either went through or it didn’t. In your case, you can pause the download and delete the temporary file (turn off automatic downloads) and then decide if it’s worth it to ask for a refund.


  Is it possible that somehow I can get back my $30, which is a wrong charge?


To apply for a refund, contact Mac App Store Support.