Use the Fidesmo Android app, iPhone app, Self Service Portal, or call your banks customer care and verify that the connection between your card and wearable are active. The connection can be put into a suspended state, which prevents payments being made.
The connection between card and wearable will expire after a few years, according to your banks policy. Try connecting your card to the wearable again, using the Fidesmo Android app or the Fidesmo Kiosk.