Chennai Metropolitan Water Supply And Sewerage Board — Water Tax

I paid the water tax for the months of February and March, 2020 on 21.09.20 and I enquired the tax collector at the centre on First Avenue, Ashok Nagar, Chennai-83 about the tax arrears to be paid.He said that there was no further tax arrears and the Govt.had not notified the dues.I checked the status online immediately after returning home and found there was no arrears of tax after Mar, 2020.I presumed that the water tax could have been waived till the Assembly polls.And, I used to refer to the status online frequently to find that the tax arrears were NIL.Till last month, my online reference showed no arrears of tax.
Today, I referred to the online status, but to my dismay, I FOUND a sizable amount as tax arrears from April, 2020, including the surcharge.upto December, 2020.It is highly ridiculous.It shows the tendency of the state Govt.to fool the public in many ways.How, all of a sudden, tax arrears pop up in the account?It shows the mismanagement of the CMWSSB and the concerned officials should be held responsible for giving wrong infos.to the tax-payers.They should be suitably penalised.Will the concerned Minister look into the matter?