About order without discussion

I received an order without any discussion with the buyer. (http://fiverr.com/users/gihan5rr/manage_orders/FO42C8735055).
Buyer didn't send me a message, directly ordered! I need to cancel it. If I cancel it, my level will be down?

Please I need to cancel it, because I did not discuss with the buyer...I mentioned in the 'Additional information for buyer', that first explain the requirement & order!