The answer
Renewing a standard .at domain currently costs €15.99 total price for another year. Automatic renewal and automatic card charging are currently not active.
Check the deadline shown in your account; it may be earlier than technical expiry. Contact support@atdomain.at in good time to renew. Non-payment is not a confirmed cancellation.
What to do
Select the domain in your account and check the renewal deadline.
Request renewal using the available request link or by email.
Review the response and total price, and complete the confirmed steps in time.