Customers who placed orders with a company offering discount fine wine say they are still waiting for delivery.
The supluswine.co.uk website is no longer contactable by telephone and West Yorkshire Trading Standards is investigating complaints from a number of consumers who have paid money for wine they have yet to receive.
Some are understood to have received refunds but others say their cards were debited at the time of their order and they have been unable to get their money back.
Recently a member of staff told Harpers that the site had suspended sales while it coped with a backlog of orders, following an unexpected surge in interest.
But on March 26 - the day many orders were due for delivery - the Leeds restaurant owned by surpluswine.co.uk's parent company, Mardenis, closed for business. Efforts to trace owner Denis Lefranq have failed.
Surpluswine.co.uk took advertising in the Mail, Telegraph and Times newspapers.