I had a similar issue where they double shipped an order.
I never received an order confirmation email, or anything else indicating the order had gone through.
I called and checked beforehand to ensure the first order (also an error finalizing the online order) did not process.
They said it did not, so I went ahead with the "second" order.
Each order total was around $80.
I finally settled on keeping the second order for about $20 cost, as it would have cost as much to return ship the items where I am also in Canada.