Message software not genuine

Hello,

I purchased Microsoft Office 2003 in 2005 from 'desktopjunction' on eBay and until recently all the software has been operating with no errors at all.
Excel 2003 was the first to have the error message appear followed by word 2003. Front Page 2003 is the only other software in the package that I use and that appears to be clear of this error.

This message is worrying as I have a lot of saved data over the years and I am wondering if after the 5 days remaining I will still be able to access the data.

I have sent a message to 'desktopjunction' informing them that the software they sold me was not genuine but have had no comment from them.

I am 77 years years old now and can't afford to repurchase Excel, Word and Front Page again.

regards,
silentcat