Refund? Dealers aren't retail stores. Once the exchange of money and product have been passed, the deal is done. refunds, ha ha! That's a good one.

If I was in the area of this grit weed, which seems to be mainly in the UK, I would be checking every single bag I get before handing the money over. Just a quick glance, nothing over the top. You can see through the bag.

I would just try to find a new dealer or like I said, inspect the weed before buying, but a refund will never fly.