Basically the garage have to carry out repairs with 'reasonable competence' or you have a claim against them. So that is what I would do. Tell them to fix it at their expense or take them to the Small Claims Court if the refuse.
Unfortunately that engine (1.8 K Series) is a well-known can of worms and should only be worked on by specialists. That is to say 'Official' or 'Independent' Land Rover dealers and even they get into trouble.
In my opinion one should never use a short engine (I didn't know that you could get even get them) for this car unless the person putting it together is very skilled - see above. However your garage have done so and they will have to get themselves out of the mess they have gotten in to.
t
July 2008