Delhi Jal Board — RDDT reading , Bill extremely high in 5 figures

My average consumption is 18-25 unit per month since many years with bill average amount between Rs300-500 but this time bill shows as usage of 228 units with a bill in five figures.

KNO: [protected]
Bill No.:[protected]
Bill Cycle: ZALL[protected]
Bill Basis: Provisional : Assessed Average

There is certainly some error which i would request you to check