Municipal Corporation Of Chennai — property build in area is 165 sq ft but property tax collecting for 240 sq. ft

Address:	Chennai, Tamil Nadu, 600040
Website:	Chennai corporations

My shop is in chennai annanager sindur complex and as per document constructed area 165 sq. Ft but revenue officer put in his system 240 sq ft so i am paying 75 sq ft extra property tax to chennai corporations since last 20 years but even i send several written letters to them, no action from chennai corporations. May i go for consumer court to get back all extra money paid from me to chennai corporation. Is it offence, if i book a case against chennai corporation, please try to help me.