If you were only charged for photocopying, at the rate stipulated in the strata agency agreement, then that is probably an unavoidable expense.
On the other hand, if you were charged for access to the records that is not appropriate. Those records are at the heart of the responsibilities of the secretary, who also determines who has access to the records. Notwithstanding the delegation of the duties of the secretary to a strata managing agent, the secretary is still entitled to exercise their functions as set out in s43 SSMA 2015, by virtue of s54(2) SSMA 2015.