Neighbor keeping tap open, causing massive leakage issue & traveling out of town

My neighbor (residing in a flat above), keeps the tap open & is traveling out of town (for attending a wedding at Lonavla), resulting in massive leakage issue in my flat at Mumbai. Inspite of explaining the situation to his dad (residing in Dubai), sharing video of the leakage mess caused over 5 hours of nonstop drippage from multiple locations of my ceiling, doesn't helps with any solution, refuses to even share contact number of his son (who is attending wedding, after causing such a big trouble to us). He (his dad i.e. owner) only says he has informed a relative who will pass on the information to his son, as he cannot directly connect with his son due to network issues. This happens every now and then, whenever they come to Mumbai and create a mess for us, there is pending leakage problem in Kitchen & washroom too, which is also unattended over the years now. Whenever they come to Mumbai, the drippage starts in both kitchen & washroom. Inspite of several complaints at society office, our problems remain unattended due to his non-co-operative behaviour and non-availability.