1. Communicate. If you’re still in a position to fulfil orders, make it clear on your website. If you’re not, make that clear too. It’s very confused at the moment but if you can be clear about what you can and can’t do, you’ll be ahead of many of your competitors.
2. If you’re really battling (e.g. you sell cruise line tickets or concert tickets) then you might need to make some hard decisions about your staff. It’s tough but they will understand.