Was it his car that was leaking?:)
Have a good look at it tomorrow in the morning light.
Suss out what the bond is that they will hold back and how much you have spent / will spend on sorting the pavers.
If thats the only thing you have to worry about then seriously have a good look at cutting the losses and just moving on.
Or give em the hubbys Bank account details
You have better things to concentrate one