Even!more than that, at some point you start including "You are paying me $xxx/day to do nothing productive because I'm unable to get 15 minutes of time or even acknowledgement of requests from persons X, Y and Z."

My other thought was to file blocking bug/defect issues on the relevant software because obviously if it can't build in the first place it's certainly not passing QA.

Some of this may get to the level of passive-aggressive or aggressive-aggressive bridge burning.