When a payment fails, Modrinth will suspend your server and attempt to charge you every two days to get your server operational again. Since our system will only attempt to charge you every two days, if you have just updated your payment method, you may need to wait up to 48 hours for your card to be charged.
However, Modrinth's support staff can override this 48 hour timer. If you want your server subscription to be renewed instantly, please open a ticket using the green bubble in the bottom-right corner. Select "Modrinth Servers", then provide the requested information under "I have a billing issue with my server".