Companies going into administration/insolvency are usually taken over by appointed administrators who may find ways to continue the business in one form or another, until the times comes that nothing further is required of their services.
The mysteries of insolvency laws are very complex, and the average layperson hasn't a chance of really understanding them.I have been in the position of having companies go bust on me, and it isn't a very pleasant experience, especially if your chances of getting any recompense are slim or nil. Hence the suggestion of paying for goods and services by credit card or certain finance arrangements, which might provide safeguards under Section 75 of the Consumer Credit Act.Did you pay that way, because if so, your warranty may still be intact!.
Regarding advertising, this is usually done months ahead of publication, so to stop any advertising immediately would be near impossible. In fact, some of the advertisers may be in the same position as yourself, and like yourself need to register as a creditor with the administrators.