Municipal Corporation Of Greater Hyderabad — illegal ground water selling

Address:

Hyderabad, Andhra Pradesh, 500083

My parents bought an house in rampally cross roads, SLN colony about 11 years ago. There's been an illegal selling of ground water from a small bit of land more than 10 tankers a day. Since then my parents tried to complain about the issue, but no one were supporting them instead they were frightening them not to involve in such issues.
In this 10 years my parents had to do thrice boar works for ground water. It's like paying our money someone's mistakes. What rights do they have sell ground water, upon that non taxable income in a way cheating government. Illegal money and constructing properties around.