Ticket office closed today??

Looking for assistance please
Tried to book 2 tickets for today via e-ticketing but 3 cards have failed, so I’m guessing it’s the app.
Contact us says ticket office open on matchdays from 9am until after the game but when I call message says only open Monday - Friday

So currently seems i am unable to buy the tickets in advance online, only option is going to the ticket office early
And other suggestions please?
Thanks