Apepdcl — charged for two months instead of one month

Hello sir/madam. I am resident of kattasubharao thota eluru. I live here on rent basis. Recently i got a electric bill of rs 339/-. The bill shows the previous reading which was taken on the 09/03/2020 that is 13097. And on the 09/05/2020 the reading is 13257. The total used units will be 160. This is for 2 moths so average here is 80 units. So the billing must be done on monthly usage but they calculated on total two months. Which crosses the slab from 50-100 to 101-200 units. The price of 50-100 units is 2.60/- where as 101-200 unit is 3.60/-. Here the unit rate difference will be charging us 160/-. The maximum bill i paid after coming into this house is 159/-. Not only charges per unit but also the various charges will change according to the slab o[censored]nit usage.in month of april they intimated us to pay the amount same as previous month bill. If calculated the 80 units amount will be around 160 or 170 including all the charges. So the total would be around 330 to 340. As we have paid the advance for april bill the amount should be dedicated rs 108/- so the net bill will be 200- 230/-. But i received the bill 339 after dedicating the previous advance payment. The service no is [protected]