Corporations Act 2001 - Chapter 2C - Part 2C.1 Section 173...

Corporations Act 2001 - Chapter 2C - Part 2C.1
Section 173

Link so you can read it yourself, rather than going off what the company may have told you.
I find it interesting why a company would actually be hesitant to disclose the Top 20 at any given time though, and it is obvious that at some point in time you have requested one otherwise how would you possibly know there is a charge (by GPP) for it?
If you go to that link, it describes in detail what is required and the requesting format needed to obtain a copy.

https://www.legislation.gov.au/Details/C2017C00210

Relentless company bashing, or concerned thoughts?
But I take it, continuos ramping is fine as long as you agree with it and not have an opinion?

cheers