A quick, abridged reading of the insolvency law will confirm that this is normal, legal practice. When a company pays for another defunct companies assets it does not take on any liability, either future or historic. They merely buy the name and not the stock. You ought to be thankful that they have at least made you a goodwill gesture as they have no obligation to do so. If you describe your machine's faults someone here might be able to assist. The new company should be regarded just as that and roll on the reviews.