You could call for another general meeting (tricky in these isolated times) at which the minutes would have to be presented. Or you could just get other owners to confirm your recollection in writing and insits that, in the absence of minutes to prove otherwise, they levies be adjusted.
Consider this, if there are no minutes to say there was only a 3 per cent rise in levies, there are also no minutes to prove it was a five per cent increase.
It’s a mess but it happens when you change strata managers – what incentive does the outgoing SM have to do the right thing when they’ve already been shown the door. Your secretary might have anticipated this and prepared his or her own version of the minutes.