Flatc agreement

I do not know that if you have violated  the terms of agreement or have defaulted in any payment unless why should the builder disturb your possession and enjoyment of the property especially after having handed over the possession and a letter to that effect?  A mere FIR for disconnecting the water supply and other harassment will  not be enough, obtain an order of injunction from the jurisdictional court refraining the builders from their such illegal acts, directing the Water authorities to restore water connection and all other reliefs immediately unless you will not be able to find a solution to the aggravating problem.  Pursue the case through a good local lawyer.

If you have purchased flat, you are the bonafied owner also having possession, you enjoy your possession without fear,  If the builder is harrassing then your action is justified.