Leakage from terrace garden

Hi, We have a terrace garden right above our flat and till date no maintenance has been carried out by the society. We have water seeping in our wardrobe and when we complained to the society last year ie in 2021, they informed us that as per the bye laws of the society, we need to bear 50% of the expense of waterproofing of the terrace garden & society will pay rest 50%. Why should we pay 50% again when we are already paying maintenance chgs every year ? This results in duplication of payment. Isn' t it society's responsibility to maintain the property including terrace garden which is an amenity provided by the builder & used by all ? Still we agreed and got it done for a portion of the garden where we had our doubt of leakage. But as we know water seepage is a trial and error thing so again this year, we got seepage in our wardrobe & now even ceiling of one room. It is evident that the seepage is coming from the lawn area and same was shared with the committee members in May 22. Till today ie 15 Jun '22, no action has been taken by the committee inspite of sending various texts and making various calls. During one of the calls, the secretary said that we should have taken some guarantee from the vendor of waterproofing and it was our error that we did not get it done from an experienced vendor. This argument is unacceptable as waterproofing is always a trial and error thing. We got the area waterproofed where we had our doubt. We didn't get any seepage for few months but after that again we noticed seepage so prior to monsoon, we brought it to their notice. They are blaming us for wastage of money of the society. How can this be acceptable ? So we need to know what can we do in this matter ? Should we stop paying maintenance as the society is not taking any action on our complaint ? We have read that non payment of maintenance is an offence and society can take action against the owner but what about the responsibility of the society ? If we complain a month prior to monsoon, to give ample time for resolving the issue to the society, aren't they supposed to take our issue on priority ? They have been silent on this matter & have only informed that same will be discussed in the AGM which is yet not conducted. Infact, no AGM has been conducted in last 2 yrs. Not even last year when all other well maintained societies started conducting physical meetings. What recourse do we have legally in this matter ? Just for your info, the secretary himself is a lawyer and is very close to the builder with whom we have had issues in the past hence it seems he has been instructed to not listen to our woes and do as the builder asks him to. Please help. I stay with my parents who are 80+ yrs of age and this is creating mental agony to all of us. We fear cracking and falling of POP which could be dangerous & life threatening.