Bangalore Water Supply & Sewerage Board [Bwssb] — Faulty bill or tariff change

Address: 27/1, 3rd cross kalasipalyam new extension

Iam resident of Bangalore. I have noticed my current water bill, and I have been astonished. Earlier my monthly bill use to be around 400 5o 500 rupees. However my current bill shows whopping 1100 rupees. What is the issue with the bill, is the tariff has increased or there is faulty calculation. I lodge a complaint regarding the same.