There's a thread on this vendor somewhere on this site. I believe 5-MeO-DMT IS legal in canada, but this vendor apparently sells 5-MeO-tryptamin, wich is a precursor to melatonin and not psycho-active. I believe sometimes 5-MeO-tryptamin is even sold as melatonin, although i believe that melatonin is actually n, acetyl-5-MeO-tryptamin. Melatonin is has been tested as an alternative birthcontroll pill in doses of 500mg and the only side effects where, as expected, sleepyness. It is therefore reasonable to conclude that melatonin, nor 5-MeO-tryptamin, have any hallucinogenic effect at whatever dose.
So this vendor is a cheat. Since it sells this chemical for research purposses only, you will have no case against them, unless you can explain what legitimate scientific experiment whent down the drain becausse of their fraud.