This could be due to insufficient funds, daily processing limits, or a temporary technical error. Contact Provet support and provide them with the following information:
Your Cloud ID
Invoice ID: You can find the invoice ID in the URL of the invoice page (see the image below).
Payment amount and date
PSP reference: On the invoice page, find the payment row in the Payments section. Although the payment was declined, you may still be able to print a transaction record using the transaction receipt button on the payment row (see the image below).