Subscription (Not processing Payment)

I've been trying to pay for a subscription for a template, but my Visa Debit Card keeps getting declined, despite having enough money in my account, and giving the correct payment details.

I have contacted my bank, and they have informed me that the issue is how Squarespace processes the payments online, which Squarespace have not updated to sync with my bank.

Because Squarespaces processing of online payments hasn't been updated to sync with my bank, it puts payments from accounts like mine at risk when making online payments. So payments will be not be processed and automatically declined.

Would appreciate it of Squarespace update their payment system soon. Though I doubt that will happen.