Jaquar — open flush valve nelson type

Address:

Mumbai City, Maharashtra, 400050

My complaint no is 01019935 dated 16th nov. The main knob to close the water supply in the flush valve has become in-operational. Also the cylinder is not responding.
Call center executive says it will take 72 hours.
How can the main valve of the tank in the building where i live be closed foe 72 hours.
Don"t you guys understand the seriousness of the situation.
I have spent 6000 rs for the water tanker already as the pipe is 1 1/4 inch.. And the water keeps coming into the closet because the washer ogf the maon valve of the flush valve as well as the cylinder is worn out..
Its an emergency!!!