We did try at the time but as the company went bust, they said we would be right at the back of the queue of creditors...
It's a shame as they'd been going 30 years and and we did do our homework. However, like a fair few other companies they didn't survive the changing of the government schemes in the mid 2010's. Thankfully we have 2 wood burners so we can heat downstairs, but the original cheap laminate flooring I put down to try and help is now looking a bit worn so I thought now is the time to either a) get the original system working or b) bite the bullet & replace it with one that does.