OP, with respect we know this.
As far as can be seen, the sum total of VWFS's response was the email which makes NO reference to attached docs, therefore they couldn't have been provided.
But if you ASK them, they'll tell you.
Seems pretty straightforward to me. Any appeal to IAS is given the best chance when you have the BEST evidence and not assertions. Don't be put off by other people's experiences: your case, your facts.
This is a matter of LAW and I can't see why we're dodging it.