Help please - how do I un-delete a company

Hi

I am new to Sage CRM and my co-worker has recently left, leaving myself and another admin in charge of our whole system!

One of our companies has disappeared. So have all the contacts which are linked to it.

However when I click onto the Work In Progress icon the projects are still in there, and so I can click on the hyperlink (for the project no) and it takes me into the time records screen. There is now a hyperlink to the company but when I click on it the following message appears in a red warning box:

"The record you requested has been deleted or you may not have security permissions to view it".

I have tried to search on here to see if anyone has had a similar problem but I can't find any answers. I'm hoping that the data still exists somewhere as there are ALOT of contacts attached to this company.

TIA!