Got them tensioned at local bike shop where the guy said he thought the builder had made a few key errors and they where not the best. Rode again.....15 mins later did exactly the same thing,
This bit I don't get.
You got a job done by your LBS, which failed, and you took umbrage with the original supplier of the kit?
When my girlfriend burnt the dinner, I didn't go and strop at Tesco.
Whilst I'm not saying that Superstar are behaving brilliantly, your first point of call following the 2nd failure should have been back to the LBS to ask why they'd done such a p*ss poor job.
Wheels (ignoring the hub) are pretty simple things, a rim, some nipples and some spokes. I'd accept that a poorly built factory wheel, built by a machine may get overlooked in QA and leave the factory in a dodgy state. Having someone work over the wheel by hand should have resulted in a decent job.