Need advice for a strange water problem

Assalamualaikum
The thing is hum jahan rehte hein Alhamdulillah hamesha se meetha paani aata raha he but recently from past 2 months ghar ke qareeb ek road ke pass kuch ajnabi logon ne khudayi kar ke paaani ki lines me koi garhbarh ki he (from my understanding its a shady scene, shayad kisi estate agent wghera ke saath mil kr unhon ne hamari gali ki line cut kr ke apne ilaqay ki line connect ki he) aur wo koi official ya water board wale nahi the.
So is scene ke baad se sirf hamari gali me paani aana band ho gaya he, jab ke humary aas paas wali galiyon me paani ka koi issue nhi he. Log daba kar paani ka istemaal krrhe hote hein jissy dekh ke bari jalan hoti he xD

Anyways, hamari gali me taqreeban sb ne boaring karwayi hui he so kisi ko is baat se itna farq nhi para lekin ham jitna ho sakta he avoid kar rahe hein boaring ko. kyu ke jab meetha paani available he to kyu apne haq ke liye baat na karein

We tried to contact the water board, unho ne agay peechy ki baatein krke taal diya.
Kya karna chahiye? bina kisi authority ke hum bhi jaa kr khudayi kr skty hein?
I need advice if anyone has gone through this strange problem (most probably kisi ne face nhi ki hogi).
Legal or unofficial dono advices chalein gi :)
Thanks