Punjab State Power Corporation [PSPCL] — bill payment not updated online

Address: Mohali, Punjab, 140301

I have paid my last bill in april 2018, according to the bill, starting date was november 2017 till april 2018. I paid it on 20th april 2018, before due date.
Now the issue is that, i haven’t recieved any new bill as a hard copy, but receiving online bill of amount 13000rs approximately, which is again starting from november 2017. The payment i had done, is not updated yet. Due to which extra charges as a late charges are also getting added to my bill.
For your convenience, i am uploading some screenshots.