Posting on behalf of my neighbour here (who has ironically not had much luck contacting anyone via CS in app).
Her and her other half of just opened a joint account but are having difficulties trying to order a card. She’s tried at work, at home, on WiFi, not on WiFi, etc. but continues to receive the same message. It’s the same on her other half’s phone.
I’ve never heard of or seen this on the forum before. I’m not sure whether anyone from @StarlingSupport can either get in touch with her and/or provide some insight into why this is happening.