It's entirely plausible Google won't tell Railway without an NDA to prevent them disclosing exactly what set it all off.

That case is called:

or Railway can tell us that Google is refusing to tell them.

I'm not paying you (which let's face it, that's what an NDA is) just to find out why you messed up about as severely as one can imagine. In theory, there was a contract here: $ for cloud services, and the rug got pulled. One should get a very clear, and very apologetic explanation as to why, with no strings attached, or one should be voting with their wallet.

Now, whether Railway will do any of that, who knows.