Delhi Jal Board — false water metre reading and bill

Dear Sir My KNO[protected] and i am staying in f-64 vishwas park, rajapur, uttam Nagar, Delhi from last 9 months. I am consuming 500 ltr water tank for 5 day, means i am consumed only 3000 ltr of water in one month, but my bill is not coming according to consuming water. I have paid Rs 1230 in the month of october 2014 and after october 2015 just receive a bill of Rs 1860, Which is very high. Please check my water metre and correct my water bill. If my water metre is not correct please replace it as soon. Regards