Tamil Nadu Electricity Board [TNEB] — EB billing excess

Address:

3/24, North Kumara Samiya Puram Street

Hi
Good Morning!!!
EB consumer Number : [protected]
Name : Sivakumar A

Last 50years I'm not paying more then 600INR but today I received 3663INR it's very big amounts in my full journey.
I asked near by EB service he is telling to 4month EB amount add for this month. It's not good right and if added mean per unit cost current will be increased so if all are cheated for people. Please raise the complainant.