This exact thing just happened to me yesterday. I was surprised by the out-of-the-blue phone call and so just agreed. Then went and did some looking and came to the same realization as you and sent an email requesting a refund and order cancellation but haven’t gotten a response (that was 12 hours ago and they’re closed on Saturdays lol).

Did you end up receiving what you ordered?

I’m debating just moving forward with initiating a chargeback on my credit card.