What Tony L said.
The application to have the company stuck-off at Companies House does not necessarily mean that the Company is bust. The normal course of events would be that a Creditor or the directors of the Company would make an application in the High Court to wind the Company up, which if granted would place the Company in the hands of Adminstrators. This does not appear to have happened, as such an application should be preceeded by a notice in the London Gazette. In searching the Gazette, it seems that HM C&E applied to wind up a Company called 'Mana Acoustics Ltd' in July 2000, but there are no recent applications.
If the Company is or has been trading insolvently, then the directors of the Company can be held personally liable.
If you are owned money by a Company for goods you have not received, then the best advice is to try to talk directly to the management of the Company to resolve and/or clarify the position. If you cannot do this to you satisfaction, you can issue a Statutory Demand and follow that up with a winding-up petition if it doesn't produce the desired result. The first, is pretty easy to do, and you could do yourself, the second is more complicated and expensive.