Oh! The 'American Candy' store in the Eastgate Centre is the same scam as well. They bring in goods quickly and then shuts down when sold out. And then you see it reopens quickly again. Sometimes different types of goods, not just American foods. Sounds like the same company doing the rounds, I think.
Inverness is dire, full of shops like that...and the places that rent to these guys just don't care, because they're happy to have the money come in for a month or two, probably charge upfront knowing their game. Uggggh!
I'm sorry you've experienced that, but at least you had your eyes and ears open and didn't get too far.