That’s really disappointing to hear. If no laws have been broken looks like you are out of options. Maybe try another approach. Try and join the strata committee, you only need one person to second it. Then, instead of wasting all of your energy badmouthing and making complaints against the committee, put your time to good use and help getting something done in your block of units and find a good quote for the windows yourself?
Try it!
Best of luck.