I’m sure if you call Delta’s Office in Cambridge (01223 874346) and ask to speak to Matthew Byatt, the operations director, direct, he’ll get to the bottom of things for you.
Having worked as ground crew on a number of occasions for the past two years with Delta, I can tell you that they’re as honest and commited a bunch of people as you’ll ever meet (in contrast to some other rather dodgy folk that you find in aviation!).
Sadly when you’re operating sixty-plus year-old aeroplanes, there are times when things go wrong – and the overriding safety rule always is, if you’re unhappy with either weather or servicability, you’d don’t fly.
I’m sure Matt will want to check why things haven’t been done to their normal standards.