The store's lack of response may be indicative of the poor customer service that probably caused them to go out of business in the first place.
If they charged your card, they should have shipped the order. Stores with good customer service will ship, then charge your card, then give you a tracking number.
It might be still in transit, or weather delayed in transit if the order was shipped via parcel post or UPS ground. It's been only about 2 weeks, I'd give it another week before you start panicking. If it still doesn't arrive in a week or so, there's plenty of time to start disputing the card charge, etc.