Should I attend another company's con in Sheffield on 8.2.26?

[Rich-Allen1976]

It's Creed Conventions, I did a day's "work" at their last Sheffield gig at Ponds Forge circa last October, and I still haven't been paid a penny of my expenses claims despite sending in receipts for almost everything.

Therefore I don't rate the company's organisation skills, however, as I'd be going as a guest this time, and it's only at Ponds Forge in Town, should I risk it?