you can't see. but with klicking on premium again - you have a red buttom to stop it. bottom of site. also you can ask a programmer to add this datas. I also think it should be possible to see them.
The premium account page has been updated to include the date that the payment is due! Thanks, that's very good, but stupid old me cannot remember how much he is paying! It might be useful to include also the amount! Cheers! :)