Can't findsolution for my minor problem, been reading help 24h

I simply logong to WOrdpress ONLINE. I do not have it installed on my laptop.

I made a page : http://yourtrashismycash.wordpress.com/orders/
and i do not remember the adress i’ve entered to send the form to .
For, this is a ”website” i made for the Kenyan artist (as you see)

How on earth do I recover the email adres I’ve setup there ? (i know it’s gmail)

Excuse me for my stupidity. ALl the plungin stuff I’ve been ready isn’t my cup of tea YET.

Thanks for advising