Lucknow Nagar Nigam — House tax Increment and house mutation

My House ID is 9157A29343. I have submitted House Mutation request on[protected]. Mutation number is 17781/OL/9157A29343 . Instead of taking care of mutation request Lucknow Muncipal corporation increased my Tax 6 times the current value Rs540 . Now my new Tax is Rs 3132. I have only Ground floor build and area is 600 Sqft. How can my tax be 6 times the current value? and why my House Mutation request is not taken care and only increased the tax.