hello sir

i am bhagwan dutt chaudhary from lucknow alambagh i am a govt employee.
sir i take a airtel broadband connection of 128kbps which charges is 599/month
which number is 05224065196.
my bill for 20days is 797.sir how it is possible it should be less than 599 but it is higher.
and then person how come to my home also told a scheme that they give 20% discount for govt employees.then how it is 797rs only for 20days.
airtel cheated with me.
sir please resolve my billing problem as soon as possible
my no is 9415767335