Gee – that sounds like our old strata manager. We did change managers but had to give the obligatory 3 months written notice in accordance with the standard Strata Management Agreement, during which time of course nothing was done in relation to our strata requirements. But we now have a new manager, and whilst at a very early stage in our relationship, the difference is already amazing.
We did go through the process of the general meeting as required, and then, having got agreement, gave the written notice which commenced the three months notice.
You certainly have a right to demand to have the financial information you require – see the Strata Schemes Management Act 1996 No 138, Section 33 – Division 3 “Accountability of strata managing agent”. However, as you have indicated, we also had difficulty with communication. We found that our strata manager tended to ignore emails; and phone contact got a verbal response but not always followed up with action. So you may have to go down the path of a written letter hand delivered with a receipt required. Section 37 of the Act advises on the procedure to get this information. However I am sure the legal people on this site will be able to assist you further with that aspect.
Good luck. 