What is that you are going to with any judgment, first of all you have not filed any case nor they have filed any case against you.
If you do not want to pay the amount, you wait for them to give in writing the demands whatever they make with you.
You can issue a legal reply notice to them refusing to pay the same for the reasons whatever you may rely upon.
No doubt you have not occupied the flat from the date of formation of association, whereas you cannot deny the fact that you have booked the flat even before the formation of the society, if yes, then find out for what reason that you have been delayed to take possession.
If the delay was due to the builder side reason, you can very well transfer the responsibility on builder and point this to the society and direct them to collect the same from the builder.
Also you find out that if there is any bye law forcing you to pay the maintenance charges for the period prior to you taking possession of the flat.
After ascertaining all the ground realities you prepare yourself for legal battle agaisnt the society.
All the resolutions passed by the society in a meeting need not necessarily be made as bye law of the society, there has to be a justified reason to accept them as bye laws.
If there is a possibility for any amicable solution, you may try otherwise take the assistance of a lawyer and proceed legally for lawful solutions.