They're required by law to provide the union with requested info as it reasonably pertains to a contractual issue/violation. Hopefully your BA knows this. Maybe you might remind him(her).The only answer the BA gives is that "they're not giving me the info you've requested". That's it.
I have documented duplicate stops and proximity stops that I was delivering that same day being sent to the po.
I did the documentation on my own but can't be sure I got it all without the info I requested.
Good job on your documentation. The more information, the better chance of success.