Buys a $15 DVD item, with his selection of $3.49 regular shipping, and did not order tracking, but asks for it after the shipping is long gone and will cost $20 in my expense, to ship Toronto to Alberta (he knows the cost because he lives in Alberta), says he does not receive packages, unless I can give the tracking number. Message written by buyer is demanding: "You are not helping our situation. If you did ship the package by Canada Post, you should have a transaction number. If you give this to me, I may be able to get them to trace it. Otherwise, either ship another or refund my money.
Why is this so hard for you to understand?"

My final decision is refund and let him go (my loss).