Hi Indigo,
In the first instance it may be worthwhile attending the strata manager’s office to attempt to talk through the issues and pick up copies of the important documents (strata roll).
You may wish to check if your strata manager is a member of ISTM (institute of strata title management) or Strata Community Australia and if there is any known issues with your strata manager.
The answer in relation to getting the records in the worst case situation is contained in section 105 of the SSMA
Hope this helps