Zoom subscription update

I use Zoom Pro socially. To renew my subscription this year I needed to update my payment details (new card). I have tried two CCs, both known to work but get the following message: "Page Id in signature is invalid (2)". The Chatbot says the cards use the incorrect currency but the update page says payment will be taken in pounds sterling. (I have this problem with Kaspersky as well but other payments are unaffected). Help! R