Update: After several rounds of back-and-forth I am requesting them send me a return UPS label. Tandy claims they cannot process gift cards on orders shipped from their warehouse (only for orders processed at a store). They have stressed several times this is a new discovery, and yet if you start an order on their site and go to check out, the instructions for how to use a gift card are still there. They still have stores open, presumably still able to take Tandy gift cards, and presumably with working telephones. So I think it’s a case of “don’t want to” rather than “can’t” at this point.
The thing that really gets me is that along with the gift card number in the order special instructions space, I put a note to the effect, “if this card can’t be used on this order please let me know before processing.” They ignored that as well.
I’m sure I’m being a big jerk by not cutting them some slack in these trying times, or somesuch. If you say you’re open for business, be open for business.