If I have to drive to Scotland and sort it you won't be without it too long.
1st thing though is get it back even if you have to lose the money you paid.
I'm sure a new computer will cost more.
Then do some very quick basic tests to see if even works and report back.
Oh and I ain't kidding about driving up their, just to prove not all engineers are P**cks
sorry my blood boils at this sort of thing, especially as PC's when you get to know them aren't that difficult