Tata Power — Electricity bill is higher than the usage

I am a tata power mumbai user from mira bhayandar, my concern is Electricity bill is higher than the usage, i check my last six months its average near 150 units and this month billed units of 295 units. i complaint against about this to tata power customer care phone they reply me bill you as per your usage and as per reading. i say about is to customer care but there is no response and they asking me to check meter faulty and ask me about meter checking charge around 760+tax.