I don't agree with the simplistic view. What would you have done?
Even if they'd all resigned and said, no, the company is in trouble, I'm not willing to sell items I worry the customer will not get, then somebody else would be hired to do it, or the last person who had appeared would be incurring your wrath.
Again, it is not the presenters' fault customer may not get their items, which at the time was an operating, functioning company trying to make money by selling to keep it afloat and keep people's jobs.
The management could or should have had a closing down sale and a fulfilment guarantee.
The only things they are responsible for is poor, bad or unethical sales tactics or ASA breaches. Not the management of the company and its fulfilment and cashflow processes.
1. They're employed/contracted to do their job. They would have been in breach 2. Somebody would have been on when the lights went out. Even if nobody took over then whoever had last been on air would be the scapegoat.
The presenters are not responsible for the failure of the company and any stock/supply issues. They are salespeople which is not a dirty word if done properly.
Yes, their "I'm alright jack", found another job, attitudes is not ideal, and galling for others from IW who may be jobless or in difficulty. But no different from workers in any company who lose their job and find another. Do you expect them to not do their job at another company. Whether you like them or their style, is irrelevant to the case in point.
Because it is TV and you viscerally see only them as the TV channel representatives and never see owners, or management on screen, they take the brunt of mismanagement. Despite doing their jobs, which they were contracted to do, even if badly and even if their poor sales caused the business losses.
You ire and anger should be more directed at the owners and management, more than any of the 'staff', front or back of house, imho.
There has to be a last day. A bit like politicians, all TV shopping channels/careers end in failure!
And you move on.