What are you trying to get your money back for exactly?
You ordered an illegal product, cannabis seeds, and they got caught by customs.. attitude performed their job..
If.you were on a corner buying crack and the dealer ran off with your money, would you try and call your cc company to get your money back than too?
Next time pay the few bucks more for guaranteed delivery, that way if customs does its job, you have a leg to stand on, otherwise if.you don't pay for guaranteed and they get snagged, you're s.o.l..