Online by card (Visa or Mastercard), through NETOPIA Payments. You pay straight from the invoice page in your client account, and the payment is confirmed insta...
You can move to a larger plan or size directly from your client account; upgrades are applied automatically. If you move to a smaller size, the difference becomes account credit, not a refund.
If you already have an unpaid renewal invoice and want to change plan, open a support ticket from your client account with the invoice number so we can confirm what remains to be paid.