Sounds a lot like the problem I had a couple of years ago with SpeedyGuy....now there'* an oxymoron.
Persistence paid off. Bug the hell out of him until he caves. Find his phone number and call him. Keep the conversations friendly (bite your tongue) and always follow-up.
It took me 8 months to finally get that Lsd, but I had paid $800, so a lot more to lose.
Some guys just don't have the mental fortutude to retain long term memories......he is only Mortal.
I am a lot more careful with whom I deal with now.
I receive a lot of goods over the border into Canada and it generally takes about 6 weeks if the Customs papers are not accurate, 3 weeks if they are.
Even one day overnight Courier takes 10 business days to get to me.