How do I renew my domain purchased from Wix?
Wix domains are set to renew automatically. If you turned off the auto-renewal for your domains, you can renew it before it expires from your Billing & Payment section.
To renew a domain: Sign in to your Wix account > at the top right of the page, hover over the user panel > click Billing & Payments.
Under Domain Subscriptions, click Manage next to the relevant domain > next to Expiry Date, click Extend.
It is not possible to use a free domain voucher to renew a domain. The use of free domain vouchers is limited to the purchase of new domains only.