At the very least, an item for discussion at the AGM. The purported meeting was ‘recent’ and the AGM is in one week. Therefore, it seems reappointing the manager could have waited till the AGM which would have been the proper forum for the decision.
Do you have 7 members of the committee or is it 7 members of the whole owners corp? If the decision was made just by the committee, it was invalid for that alone. This is a decision for a general meeting. If the 2 people attended what was purported to be a general meeting, where was the meeting notice that should have gone to all owners?
What to do depends on whether you would like to continue with this manager in spite of the poor behaviour. If you would want to continue, you could propose a motion that would validly appoint the manager. IE you can remedy an improper process by retrospectively doing it properly.
If you don’t want to reappoint, then you might need to discuss at the AGM then the incoming EC could instigate the process for calling a general meeting to properly appoint a different manager.