Yes, do message him, within ebay. That will give you ebay's assistance if this isn't resolved. It doesn't always help. I recently had a no-show of an ordered item. The sneaky seller, told ebay I'd be reimbursed immediately and I checked my bank account daily for it. It never arrived and when I tried to take further action the account was already closed, so nothing more I could do. Luckily not for too much money and it doesn't sound as if you've spent a fortune either, but no-one should get away with this, so act now, while there's still hope of getting a resolution.