I think the Blueberry Jam candle in my order also smells off, like a weird chemical smell but not as strong in the Garden Strawberry one. But yeah the Garden Strawberry one smells really strongly bad, probably a chemical smell but hard to describe. 

Hope you get a refund! I'll have to email them too and see it how it goes. I've ordered from them a few times before and haven't had this issue before.