Telangana Electricity — bill received as negative in february 2018

I am from masab tank area.in february i received the bill for one meter as negative due to unseen meter reading in previous month.
Refer usc:[protected]
S no.: a3007730
Name: t sajed
Address: 10-5-25/1/4, masab tank.
Bill dated 05/02/18 is rs. (-) 2085.00 after adjustment of excess payment
However, bill dated 10/03/18 is issued for rs. 51.00 without considering the adjustment amount of rs. 2085.00. Pls. Check and adjust.
In case i pay the current bill of rs. 51.00 then how could i recover the outstanding amount of rs. 2085.00 from telangana electricity. Pls. Clarify.