Sideface:eracode:scuwp: Or simply don't turn up. Most don't and rarely does anything come of it.
Sounds like good advice to me under the circs. Seems OP has no real alternative - a wee bit of civil disobedience.
"A wee bit of civil disobedience" can be expensive: "If the registrar hasn’t excused you from jury service and you don’t attend, you can be fined up to $1000."
$1000 is pocket change compared to what I'd lose. My contract could be cancelled due to the fact they need 100% reliability. They are a foreign client so don't care about NZ jury system.