Bangalore Water Supply & Sewerage Board [Bwssb] — Arrears

During the lockdown period, i did not get the bwssb bill. When i saw in paytm, i found that the bill has been generated and hence paid the money through paytm. But last month, when the physical bill came, the amount i paid was shown as arrears. I paid all the amount except the arrears with the through that this will get rectified next month. Now this month too, the amount paid through paytm is shown as arrears (With a fine of rs. 100 added). What should i do now?