I'd call £10 for two spokes and the fuel to get to the shop and back pretty scandalous to fix such a regular problem that hits us all, sooner or later.
The whole point with these wheels we warned you about was the fact that it was trouble to sort it out, a normal DT hub and Mavic rim combo would have seen you trued up and on the road the next day with the help of carbon Bob or Glynn or Lloyd, and probably cost you a pint.