Well at least you were able to contact them and cancel your order. It states specifically in their shipping policy that there are no refunds when something is seized. I guess thats what you get when you jump into something without looking.
In the mean time you may want to take the time for familiarize yourself with how airsoft works in Canada. The information in the FAQS section should clarify any questions you may have as to how things work. I highly recommend you review at least some of the information today and finish another day as there is much to go through and it would be silly to expect any human brain to comprehended it all in one shot with a clear understanding.
"Its only a little bit on fire"