Can't upgrade account to Team subscription (stating CC is invalid) - Need Support/Help to complete transaction

Attempting to upgrade a company account (gbetdockerhub) to a Team subscription but payment keeps failing on a valid CC. The details are correct, there are funds available but I keep getting ‘CC is Invalid’. I have tried to email via Support/Contact page but got a canned response re upgrading to teams. I need someone from docker to assist me or provide the rules that are triggering the error (assuming the my CC details are correct and you are accepting upgrades from Ireland).

Thanks
Simon McCabe